1
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Tang J, Christofferson AJ, Sun J, Zhai Q, Kumar PV, Yuwono JA, Tajik M, Meftahi N, Tang J, Dai L, Mao G, Russo SP, Kaner RB, Rahim MA, Kalantar-Zadeh K. Dynamic configurations of metallic atoms in the liquid state for selective propylene synthesis. Nat Nanotechnol 2024; 19:306-310. [PMID: 37945988 DOI: 10.1038/s41565-023-01540-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 10/10/2023] [Indexed: 11/12/2023]
Abstract
The use of liquid gallium as a solvent for catalytic reactions has enabled access to well-dispersed metal atoms configurations, leading to unique catalytic phenomena, including activation of neighbouring liquid atoms and mobility-induced activity enhancement. To gain mechanistic insights into liquid metal catalysts, here we introduce a GaSn0.029Ni0.023 liquid alloy for selective propylene synthesis from decane. Owing to their mobility, dispersed atoms in a Ga matrix generate configurations where interfacial Sn and Ni atoms allow for critical alignments of reactants and intermediates. Computational modelling, corroborated by experimental analyses, suggests a particular reaction mechanism by which Sn protrudes from the interface and an adjacent Ni, below the interfacial layer, aligns precisely with a decane molecule, facilitating propylene production. We then apply this reaction pathway to canola oil, attaining a propylene selectivity of ~94.5%. Our results offer a mechanistic interpretation of liquid metal catalysts with an eye to potential practical applications of this technology.
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Affiliation(s)
- Junma Tang
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, Australia.
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia.
| | - Andrew J Christofferson
- School of Science, STEM College, RMIT University, Melbourne, Victoria, Australia
- ARC Centre of Excellence in Exciton Science, School of Science, RMIT University, Melbourne, Victoria, Australia
| | - Jing Sun
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | - Qingfeng Zhai
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | - Jodie A Yuwono
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia, Australia
| | - Mohammad Tajik
- School of Chemistry, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | - Nastaran Meftahi
- School of Science, STEM College, RMIT University, Melbourne, Victoria, Australia
- ARC Centre of Excellence in Exciton Science, School of Science, RMIT University, Melbourne, Victoria, Australia
| | - Jianbo Tang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | - Liming Dai
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | - Guangzhao Mao
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | - Salvy P Russo
- School of Science, STEM College, RMIT University, Melbourne, Victoria, Australia
- ARC Centre of Excellence in Exciton Science, School of Science, RMIT University, Melbourne, Victoria, Australia
| | - Richard B Kaner
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, CA, USA
- Department of Materials Science and Engineering, University of California, Los Angeles, CA, USA
| | - Md Arifur Rahim
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, Australia.
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia.
| | - Kourosh Kalantar-Zadeh
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, Australia.
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2
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Fojt J, Rossi TP, Kumar PV, Erhart P. Tailoring Hot-Carrier Distributions of Plasmonic Nanostructures through Surface Alloying. ACS Nano 2024; 18:6398-6405. [PMID: 38363179 PMCID: PMC10906084 DOI: 10.1021/acsnano.3c11418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/08/2024] [Accepted: 02/09/2024] [Indexed: 02/17/2024]
Abstract
Alloyed metal nanoparticles are a promising platform for plasmonically enabled hot-carrier generation, which can be used to drive photochemical reactions. Although the non-plasmonic component in these systems has been investigated for its potential to enhance catalytic activity, its capacity to affect the photochemical process favorably has been underexplored by comparison. Here, we study the impact of surface alloy species and concentration on hot-carrier generation in Ag nanoparticles. By first-principles simulations, we photoexcite the localized surface plasmon, allow it to dephase, and calculate spatially and energetically resolved hot-carrier distributions. We show that the presence of non-noble species in the topmost surface layer drastically enhances hot-hole generation at the surface at the expense of hot-hole generation in the bulk, due to the additional d-type states that are introduced to the surface. The energy of the generated holes can be tuned by choice of the alloyant, with systematic trends across the d-band block. Already low surface alloy concentrations have a large impact, with a saturation of the enhancement effect typically close to 75% of a monolayer. Hot-electron generation at the surface is hindered slightly by alloying, but here a judicious choice of the alloy composition allows one to strike a balance between hot electrons and holes. Our work underscores the promise of utilizing multicomponent nanoparticles to achieve enhanced control over plasmonic catalysis and provides guidelines for how hot-carrier distributions can be tailored by designing the electronic structure of the surface through alloying.
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Affiliation(s)
- Jakub Fojt
- Department
of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Tuomas P. Rossi
- Department
of Applied Physics, Aalto University, FI-00076 Aalto, Finland
| | - Priyank V. Kumar
- School
of Chemical Engineering, The University
of New South Wales, 2052 Sydney, NSW, Australia
| | - Paul Erhart
- Department
of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
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3
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Zheng J, Solomon MB, Rawal A, Chi Y, Yu R, Liu L, Tang J, Mao G, D'Alessandro DM, Kumar PV, Rahim MA, Kalantar-Zadeh K. Passivation-Free, Liquid-Metal-Based Electrosynthesis of Aluminum Metal-Organic Frameworks Mediated by Light Metal Activation. ACS Nano 2023; 17:25532-25541. [PMID: 38054450 DOI: 10.1021/acsnano.3c09472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
The production of aluminum (Al) metal-organic frameworks (MOFs) by electrosynthesis using solid-state Al electrodes always faces significant challenges due to the formation of a passivating aluminum oxide layer in the process. Here, we developed a liquid-metal-based method to electrosynthesize an aluminum Al-MOF (MIL-53). This method uses a liquid-state gallium (Ga) anode as a reservoir and activator for a light metal, Al, in the form of Al-Ga alloys that releases Al3+ for the electrosynthesis of Al-MOFs. Introducing Ga into the system inhibits the formation of aluminum oxide passivation layer and promotes the electrochemical reaction for Al-MOF synthesis. The electrosynthesis using liquid Al-Ga alloy is conducted at ambient temperatures for long durations without requiring pretreatment for aluminum oxide removal. We show that the Al-MOF products synthesized from 0.40 wt % Al in liquid Ga lead to the highest crystallinity and possess a specific surface area greater than 800 m2 g-1 and a low capacity for CO2 adsorption that can be used as a potential matrix for CO2/N2 separation. This work provides evidence that employing liquid-metal electrodes offers a viable pathway to circumvent surface passivation effects that inevitably occur when using conventional solid metals. It also introduces an efficient electrosynthesis method based on liquid metals for producing atomically porous materials.
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Affiliation(s)
- Jiewei Zheng
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Marcello B Solomon
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Aditya Rawal
- Mark Wainwright Analytical Centre, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Yuan Chi
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Ruohan Yu
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Li Liu
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jianbo Tang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Guangzhao Mao
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Deanna M D'Alessandro
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Md Arifur Rahim
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Kourosh Kalantar-Zadeh
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
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4
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Yang Y, Lie WH, Unocic RR, Yuwono JA, Klingenhof M, Merzdorf T, Buchheister PW, Kroschel M, Walker A, Gallington LC, Thomsen L, Kumar PV, Strasser P, Scott JA, Bedford NM. Defect-Promoted Ni-Based Layer Double Hydroxides with Enhanced Deprotonation Capability for Efficient Biomass Electrooxidation. Adv Mater 2023; 35:e2305573. [PMID: 37734330 DOI: 10.1002/adma.202305573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 09/15/2023] [Indexed: 09/23/2023]
Abstract
Ni-based hydroxides are promising electrocatalysts for biomass oxidation reactions, supplanting the oxygen evolution reaction (OER) due to lower overpotentials while producing value-added chemicals. The identification and subsequent engineering of their catalytically active sites are essential to facilitate these anodic reactions. Herein, the proportional relationship between catalysts' deprotonation propensity and Faradic efficiency of 5-hydroxymethylfurfural (5-HMF)-to-2,5 furandicarboxylic acid (FDCA, FEFDCA ) is revealed by thorough density functional theory (DFT) simulations and atomic-scale characterizations, including in situ synchrotron diffraction and spectroscopy methods. The deprotonation capability of ultrathin layer-double hydroxides (UT-LDHs) is regulated by tuning the covalency of metal (M)-oxygen (O) motifs through defect site engineering and selection of M3+ co-chemistry. NiMn UT-LDHs show an ultrahigh FEFDCA of 99% at 1.37 V versus reversible hydrogen electrode (RHE) and retain a high FEFDCA of 92.7% in the OER-operating window at 1.52 V, about 2× that of NiFe UT-LDHs (49.5%) at 1.52 V. Ni-O and Mn-O motifs function as dual active sites for HMF electrooxidation, where the continuous deprotonation of Mn-OH sites plays a dominant role in achieving high selectivity while suppressing OER at high potentials. The results showcase a universal concept of modulating competing anodic reactions in aqueous biomass electrolysis by electronically engineering the deprotonation behavior of metal hydroxides, anticipated to be translatable across various biomass substrates.
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Affiliation(s)
- Yuwei Yang
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - William Hadinata Lie
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Raymond R Unocic
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
| | - Jodie A Yuwono
- School of Chemical Engineering, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Malte Klingenhof
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Thomas Merzdorf
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Paul Wolfgang Buchheister
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Matthias Kroschel
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Anne Walker
- US Army DEVCOM Chemical Biological Center, Aberdeen Proving Grounds, MD, 21010, USA
| | | | - Lars Thomsen
- Australian Synchrotron, Australian Nuclear Science and Technology Organisation, Clayton, VIC, 3168, Australia
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Peter Strasser
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Jason A Scott
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Nicholas M Bedford
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
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5
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Chi Y, Kumar PV, Zheng J, Kong C, Yu R, Johnston L, Ghasemian MB, Rahim MA, Kumeria T, Chu D, Lu X, Mao G, Kalantar-Zadeh K, Tang J. Liquid-Metal Solvents for Designing Hierarchical Nanoporous Metals at Low Temperatures. ACS Nano 2023; 17:17070-17081. [PMID: 37590207 DOI: 10.1021/acsnano.3c04585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Metallic nanoarchitectures hold immense value as functional materials across diverse applications. However, major challenges lie in effectively engineering their hierarchical porosity while achieving scalable fabrication at low processing temperatures. Here we present a liquid-metal solvent-based method for the nanoarchitecting and transformation of solid metals. This was achieved by reacting liquid gallium with solid metals to form crystalline entities. Nanoporous features were then created by selectively removing the less noble and comparatively softer gallium from the intermetallic crystals. By controlling the crystal growth and dealloying conditions, we realized the effective tuning of the micro-/nanoscale porosities. Proof-of-concept examples were shown by applying liquid gallium to solid copper, silver, gold, palladium, and platinum, while the strategy can be extended to a wider range of metals. This metallic-solvent-based route enables low-temperature fabrication of metallic nanoarchitectures with tailored porosity. By demonstrating large-surface-area and scalable hierarchical nanoporous metals, our work addresses the pressing demand for these materials in various sectors.
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Affiliation(s)
- Yuan Chi
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Jiewei Zheng
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Charlie Kong
- Electron Microscope Unit, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Ruohan Yu
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Lucy Johnston
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Mohammad B Ghasemian
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
- School of Chemical and Biomolecular Engineering, University of Sydney (USYD), Darlington, New South Wales 2008, Australia
| | - Md Arifur Rahim
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
- School of Chemical and Biomolecular Engineering, University of Sydney (USYD), Darlington, New South Wales 2008, Australia
| | - Tushar Kumeria
- School of Materials Science and Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Dewei Chu
- School of Materials Science and Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Xunyu Lu
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Guangzhao Mao
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Kourosh Kalantar-Zadeh
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
- School of Chemical and Biomolecular Engineering, University of Sydney (USYD), Darlington, New South Wales 2008, Australia
| | - Jianbo Tang
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
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6
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Jin Y, Kumar PV. Bayesian optimisation for efficient material discovery: a mini review. Nanoscale 2023. [PMID: 37337888 DOI: 10.1039/d2nr07147a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Bayesian optimisation (BO) has been increasingly utilised to guide material discovery. While BO is advantageous due to its sample efficiency, flexibility and versatility, it is constrained by a range of core issues including high-dimensional optimisation, mixed search space, multi-objective optimisation and multi-fidelity data. Although various studies have attempted to tackle one or some challenges, a comprehensive BO framework for material discovery is yet to be uncovered. This work provides a short review aiming at connecting algorithmic advancement to material applications. Open algorithmic challenges are discussed and supported by recent material applications. Various open-source packages are compared to assist the selection. Furthermore, three exemplary material design problems are analysed to demonstrate how BO could be useful. The review concludes with an outlook on BO-aided autonomous laboratory.
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Affiliation(s)
- Yimeng Jin
- School of Chemical Engineering, UNSW Sydney, Kensington, NSW 2052, Australia.
| | - Priyank V Kumar
- School of Chemical Engineering, UNSW Sydney, Kensington, NSW 2052, Australia.
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7
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Gaikwad MA, Ghorpade UV, Suryawanshi UP, Kumar PV, Jang S, Jang JS, Tran L, Lee JS, Bae H, Shin SW, Suryawanshi MP, Kim JH. Rapid Synthesis of Ultrathin Ni:FeOOH with In Situ-Induced Oxygen Vacancies for Enhanced Water Oxidation Activity and Stability of BiVO 4 Photoanodes. ACS Appl Mater Interfaces 2023; 15:21123-21133. [PMID: 37083398 DOI: 10.1021/acsami.3c01877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The coupling of oxygen evolution reaction (OER) catalysts with photoanodes is a promising strategy for enhancing the photoelectrochemical (PEC) performance by passivating photoanode's surface defect states and facilitating charge transfer at the photoanode/electrolyte interface. However, a serious interface recombination issue caused by poor interface and OER catalysts coating quality often limits further performance improvement of photoanodes. Herein, a rapid Fenton-like reaction method is demonstrated to produce ultrathin amorphous Ni:FeOOH catalysts with in situ-induced oxygen vacancies (Vo) to improve the water oxidation activity and stability of BiVO4 photoanodes. The combined physical characterizations, PEC studies, and density functional theory calculations revealed that the reductive environment in a Fenton-like reaction in situ produces abundant Vo in Ni:FeOOH catalysts, which significantly improves charge separation and charge transfer efficiency of BiVO4 while also offering abundant active sites and a reduced energy barrier for OER. As a result, Ni:FeOOH-Vo catalysts yielded a more than 2-fold increased photocurrent density in the BiVO4 photoanode (from 1.54 to 4.15 mA cm-2 at 1.23 VRHE), accompanied by high stability for 5 h. This work not only highlights the significance of abundant Vo in catalysts but also provides new insights into the rational design and fabrication of efficient and stable solar water-splitting systems.
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Affiliation(s)
- Mayur A Gaikwad
- Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 61186, South Korea
| | - Uma V Ghorpade
- School of Chemical Engineering and School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Umesh P Suryawanshi
- Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 61186, South Korea
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Suyoung Jang
- Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 61186, South Korea
| | - Jun Sung Jang
- Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 61186, South Korea
| | - Lan Tran
- Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 61186, South Korea
| | - Jong-Sook Lee
- Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 61186, South Korea
| | - Hyojung Bae
- Optoelectronics Convergence Research Center and School of Chemical Engineering, Chonnam National University, Buk-gu, Gwangju 61186, South Korea
| | - Seung Wook Shin
- Future Agricultural Research Division, Rural Research Institute, Korea Rural Community Corporation, Naju-Si 58327, Jeonranam-do, South Korea
| | - Mahesh P Suryawanshi
- School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jin Hyeok Kim
- Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 61186, South Korea
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8
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Ma Z, Wan T, Zhang D, Yuwono JA, Tsounis C, Jiang J, Chou YH, Lu X, Kumar PV, Ng YH, Chu D, Toe CY, Han Z, Amal R. Atomically Dispersed Cu Catalysts on Sulfide-Derived Defective Ag Nanowires for Electrochemical CO 2 Reduction. ACS Nano 2023; 17:2387-2398. [PMID: 36727675 DOI: 10.1021/acsnano.2c09473] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Single-atom catalysts (SACs) have shown potential for achieving an efficient electrochemical CO2 reduction reaction (CO2RR) despite challenges in their synthesis. Here, Ag2S/Ag nanowires provide initial anchoring sites for Cu SACs (Cu/Ag2S/Ag), then Cu/Ag(S) was synthesized by an electrochemical treatment resulting in complete sulfur removal, i.e., Cu SACs on a defective Ag surface. The CO2RR Faradaic efficiency (FECO2RR) of Cu/Ag(S) reaches 93.0% at a CO2RR partial current density (jCO2RR) of 2.9 mA/cm2 under -1.0 V vs RHE, which outperforms sulfur-removed Ag2S/Ag without Cu SACs (Ag(S), 78.5% FECO2RR with 1.8 mA/cm2jCO2RR). At -1.4 V vs RHE, both FECO2RR and jCO2RR over Cu/Ag(S) reached 78.6% and 6.1 mA/cm2, which tripled those over Ag(S), respectively. As revealed by in situ and ex situ characterizations together with theoretical calculations, the interacted Cu SACs and their neighboring defective Ag surface increase microstrain and downshift the d-band center of Cu/Ag(S), thus lowering the energy barrier by ∼0.5 eV for *CO formation, which accounts for the improved CO2RR activity and selectivity toward related products such as CO and C2+ products.
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Affiliation(s)
| | | | | | - Jodie A Yuwono
- College of Engineering and Computer Science, Australian National University, Canberra, Australian Capital Territory2601, Australia
| | | | | | | | | | | | - Yun Hau Ng
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, 999077, China
| | | | - Cui Ying Toe
- School of Engineering, The University of Newcastle, Callaghan, New South Wales2038, Australia
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9
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Wu YH, Mehta H, Willinger E, Yuwono JA, Kumar PV, Abdala PM, Wach A, Kierzkowska A, Donat F, Kuznetsov DA, Müller CR. Altering Oxygen Binding by Redox-Inactive Metal Substitution to Control Catalytic Activity: Oxygen Reduction on Manganese Oxide Nanoparticles as a Model System. Angew Chem Int Ed Engl 2023; 62:e202217186. [PMID: 36538473 PMCID: PMC10108258 DOI: 10.1002/anie.202217186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/20/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Establishing generic catalyst design principles by identifying structural features of materials that influence their performance will advance the rational engineering of new catalytic materials. In this study, by investigating metal-substituted manganese oxide (spinel) nanoparticles, Mn3 O4 :M (M=Sr, Ca, Mg, Zn, Cu), we rationalize the dependence of the activity of Mn3 O4 :M for the electrocatalytic oxygen reduction reaction (ORR) on the enthalpy of formation of the binary MO oxide, Δf H°(MO), and the Lewis acidity of the M2+ substituent. Incorporation of elements M with low Δf H°(MO) enhances the oxygen binding strength in Mn3 O4 :M, which affects its activity in ORR due to the established correlation between ORR activity and the binding energy of *O/*OH/*OOH species. Our work provides a perspective on the design of new compositions for oxygen electrocatalysis relying on the rational substitution/doping by redox-inactive elements.
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Affiliation(s)
- Yi-Hsuan Wu
- Department of Mechanical and Process Engineering, ETH Zürich, 8092, Zürich, Switzerland
| | - Harshit Mehta
- Department of Mechanical and Process Engineering, ETH Zürich, 8092, Zürich, Switzerland
| | - Elena Willinger
- Department of Mechanical and Process Engineering, ETH Zürich, 8092, Zürich, Switzerland
| | - Jodie A Yuwono
- School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia.,College of Engineering and Computer Science, Australian National University, Canberra, ACT 2601, Australia
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Paula M Abdala
- Department of Mechanical and Process Engineering, ETH Zürich, 8092, Zürich, Switzerland
| | - Anna Wach
- Paul Scherrer Institute, 5232, Villigen, Switzerland
| | - Agnieszka Kierzkowska
- Department of Mechanical and Process Engineering, ETH Zürich, 8092, Zürich, Switzerland
| | - Felix Donat
- Department of Mechanical and Process Engineering, ETH Zürich, 8092, Zürich, Switzerland
| | - Denis A Kuznetsov
- Department of Mechanical and Process Engineering, ETH Zürich, 8092, Zürich, Switzerland
| | - Christoph R Müller
- Department of Mechanical and Process Engineering, ETH Zürich, 8092, Zürich, Switzerland
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10
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Tsounis C, Kumar PV, Masood H, Kulkarni RP, Gautam GS, Müller CR, Amal R, Kuznetsov DA. Advancing MXene Electrocatalysts for Energy Conversion Reactions: Surface, Stoichiometry, and Stability. Angew Chem Int Ed Engl 2023; 62:e202210828. [PMID: 36278885 PMCID: PMC10099934 DOI: 10.1002/anie.202210828] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Indexed: 12/05/2022]
Abstract
MXenes, due to their tailorable chemistry and favourable physical properties, have great promise in electrocatalytic energy conversion reactions. To exploit fully their enormous potential, further advances specific to electrocatalysis revolving around their performance, stability, compositional discovery and synthesis are required. The most recent advances in these aspects are discussed in detail: surface functional and stoichiometric modifications which can improve performance, Pourbaix stability related to their electrocatalytic operating conditions, density functional theory and advances in machine learning for their discovery, and prospects in large scale synthesis and solution processing techniques to produce membrane electrode assemblies and integrated electrodes. This Review provides a perspective that is complemented by new density functional theory calculations which show how these recent advances in MXene material design are paving the way for effective electrocatalysts required for the transition to integrated renewable energy systems.
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Affiliation(s)
- Constantine Tsounis
- School of Chemical Engineering, The University of New South Wales, Kensington, NSW 2052, Australia.,Department of Mechanical and Process Engineering, ETH Zurich, 8092, Zurich, Switzerland
| | - Priyank V Kumar
- School of Chemical Engineering, The University of New South Wales, Kensington, NSW 2052, Australia
| | - Hassan Masood
- School of Chemical Engineering, The University of New South Wales, Kensington, NSW 2052, Australia
| | - Rutvij Pankaj Kulkarni
- Department of Materials Engineering, Indian Institute of Science, Bengaluru 560012, India
| | | | - Christoph R Müller
- Department of Mechanical and Process Engineering, ETH Zurich, 8092, Zurich, Switzerland
| | - Rose Amal
- School of Chemical Engineering, The University of New South Wales, Kensington, NSW 2052, Australia
| | - Denis A Kuznetsov
- Department of Mechanical and Process Engineering, ETH Zurich, 8092, Zurich, Switzerland
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11
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Wu Y, Mehta H, Willinger E, Yuwono JA, Kumar PV, Abdala PM, Wach A, Kierzkowska A, Donat F, Kuznetsov DA, Müller CR. Altering Oxygen Binding by Redox‐Inactive Metal Substitution to Control Catalytic Activity: Oxygen Reduction on Manganese Oxide Nanoparticles as a Model System. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/anie.202300564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Yi‐Hsuan Wu
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Harshit Mehta
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Elena Willinger
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Jodie A. Yuwono
- School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
- College of Engineering and Computer Science Australian National University Canberra ACT 2601 Australia
| | - Priyank V. Kumar
- School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
| | - Paula M. Abdala
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Anna Wach
- Paul Scherrer Institute 5232 Villigen Switzerland
| | | | - Felix Donat
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Denis A. Kuznetsov
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Christoph R. Müller
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
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12
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Wu Y, Mehta H, Willinger E, Yuwono JA, Kumar PV, Abdala PM, Wach A, Kierzkowska A, Donat F, Kuznetsov DA, Müller CR. Altering Oxygen Binding by Redox‐Inactive Metal Substitution to Control Catalytic Activity: Oxygen Reduction on Manganese Oxide Nanoparticles as a Model System. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202300564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Yi‐Hsuan Wu
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Harshit Mehta
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Elena Willinger
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Jodie A. Yuwono
- School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
- College of Engineering and Computer Science Australian National University Canberra ACT 2601 Australia
| | - Priyank V. Kumar
- School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
| | - Paula M. Abdala
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Anna Wach
- Paul Scherrer Institute 5232 Villigen Switzerland
| | | | - Felix Donat
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Denis A. Kuznetsov
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
| | - Christoph R. Müller
- Department of Mechanical and Process Engineering ETH Zürich 8092 Zürich Switzerland
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13
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Landuyt A, Kumar PV, Yuwono JA, Bork AH, Donat F, Abdala PM, Müller CR. Uncovering the CO 2 Capture Mechanism of NaNO 3-Promoted MgO by 18O Isotope Labeling. JACS Au 2022; 2:2731-2741. [PMID: 36590255 PMCID: PMC9795564 DOI: 10.1021/jacsau.2c00461] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/17/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
MgO-based CO2 sorbents promoted with molten alkali metal nitrates (e.g., NaNO3) have emerged as promising materials for CO2 capture and storage technologies due to their low cost and high theoretical CO2 uptake capacities. Yet, the mechanism by which molten alkali metal nitrates promote the carbonation of MgO (CO2 capture reaction) remains debated and poorly understood. Here, we utilize 18O isotope labeling experiments to provide new insights into the carbonation mechanism of NaNO3-promoted MgO sorbents, a system in which the promoter is molten under operation conditions and hence inherently challenging to characterize. To conduct the 18O isotope labeling experiments, we report a facile and large-scale synthesis procedure to obtain labeled MgO with a high 18O isotope content. We use Raman spectroscopy and in situ thermogravimetric analysis in combination with mass spectrometry to track the 18O label in the solid (MgCO3), molten (NaNO3), and gas (CO2) phases during the CO2 capture (carbonation) and regeneration (decarbonation) reactions. We discovered a rapid oxygen exchange between CO2 and MgO through the reversible formation of surface carbonates, independent of the presence of the promoter NaNO3. On the other hand, no oxygen exchange was observed between NaNO3 and CO2 or NaNO3 and MgO. Combining the results of the 18O labeling experiments, with insights gained from atomistic calculations, we propose a carbonation mechanism that, in the first stage, proceeds through a fast, surface-limited carbonation of MgO. These surface carbonates are subsequently dissolved as [Mg2+···CO3 2-] ionic pairs in the molten NaNO3 promoter. Upon reaching the solubility limit, MgCO3 crystallizes at the MgO/NaNO3 interface.
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Affiliation(s)
- Annelies Landuyt
- Laboratory
of Energy Science and Engineering, Department of Mechanical and Process
Engineering, Eidgenössische Technische
Hochschule (ETH) Zürich, Zürich8092, Switzerland
| | - Priyank V. Kumar
- School
of Chemical Engineering, The University
of New South Wales (UNSW Sydney), Sydney, New South Wales2052Australia
| | - Jodie A. Yuwono
- School
of Chemical Engineering, The University
of New South Wales (UNSW Sydney), Sydney, New South Wales2052Australia
| | - Alexander H. Bork
- Laboratory
of Energy Science and Engineering, Department of Mechanical and Process
Engineering, Eidgenössische Technische
Hochschule (ETH) Zürich, Zürich8092, Switzerland
| | - Felix Donat
- Laboratory
of Energy Science and Engineering, Department of Mechanical and Process
Engineering, Eidgenössische Technische
Hochschule (ETH) Zürich, Zürich8092, Switzerland
| | - Paula M. Abdala
- Laboratory
of Energy Science and Engineering, Department of Mechanical and Process
Engineering, Eidgenössische Technische
Hochschule (ETH) Zürich, Zürich8092, Switzerland
| | - Christoph R. Müller
- Laboratory
of Energy Science and Engineering, Department of Mechanical and Process
Engineering, Eidgenössische Technische
Hochschule (ETH) Zürich, Zürich8092, Switzerland
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14
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Tsounis C, Kumar PV, Masood H, Kulkarni RP, Gautam GS, Müller CR, Amal R, Kuznetsov DA. Advancing MXene Electrocatalysts for Energy Conversion Reactions: Surface, Stoichiometry, and Stability. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Priyank V. Kumar
- University of New South Wales School of Chemical Engineering AUSTRALIA
| | - Hassan Masood
- University of New South Wales School of Chemical Engineering AUSTRALIA
| | | | | | - Christoph R. Müller
- ETH Zurich: Eidgenossische Technische Hochschule Zurich Department of Mechanical and Process Engineering SWITZERLAND
| | - Rose Amal
- University of New South Wales School of Chemical Engineering AUSTRALIA
| | - Denis A. Kuznetsov
- ETH Zurich: Eidgenossische Technische Hochschule Zurich Department of Mechanical and Process Engineering SWITZERLAND
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15
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Ramadhan ZR, Poerwoprajitno AR, Cheong S, Webster RF, Kumar PV, Cychy S, Gloag L, Benedetti TM, Marjo CE, Muhler M, Wang DW, Gooding JJ, Schuhmann W, Tilley RD. Introducing Stacking Faults into Three-Dimensional Branched Nickel Nanoparticles for Improved Catalytic Activity. J Am Chem Soc 2022; 144:11094-11098. [PMID: 35713612 DOI: 10.1021/jacs.2c04911] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Creating high surface area nanocatalysts that contain stacking faults is a promising strategy to improve catalytic activity. Stacking faults can tune the reactivity of the active sites, leading to improved catalytic performance. The formation of branched metal nanoparticles with control of the stacking fault density is synthetically challenging. In this work, we demonstrate that varying the branch width by altering the size of the seed that the branch grows off is an effective method to precisely tune the stacking fault density in branched Ni nanoparticles. A high density of stacking faults across the Ni branches was found to lower the energy barrier for Ni2+/Ni3+ oxidation and result in enhanced activity for electrocatalytic oxidation of 5-hydroxylmethylfurfural. These results show the ability to synthetically control the stacking fault density in branched nanoparticles as a basis for enhanced catalytic activity.
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Affiliation(s)
- Zeno R Ramadhan
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
| | | | - Soshan Cheong
- Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Richard F Webster
- Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Priyank V Kumar
- School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Steffen Cychy
- Industrial Chemistry, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, D-44780 Bochum, Germany
| | - Lucy Gloag
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Tania M Benedetti
- School of Environment and Science and Queensland Micro and Nanotechnology Centre, Griffith University, Brisbane, Queensland 4222, Australia
| | - Christopher E Marjo
- Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Martin Muhler
- Industrial Chemistry, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, D-44780 Bochum, Germany
| | - Da-Wei Wang
- School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - J Justin Gooding
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.,Australian Centre for NanoMedicine, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Wolfgang Schuhmann
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, D-44780 Bochum, Germany
| | - Richard D Tilley
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.,Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, NSW 2052, Australia.,Australian Centre for NanoMedicine, The University of New South Wales, Sydney, NSW 2052, Australia
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16
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Tang J, Kumar PV, Scott JA, Tang J, Ghasemian MB, Mousavi M, Han J, Esrafilzadeh D, Khoshmanesh K, Daeneke T, O'Mullane AP, Kaner RB, Rahim MA, Kalantar-Zadeh K. Low Temperature Nano Mechano-electrocatalytic CH 4 Conversion. ACS Nano 2022; 16:8684-8693. [PMID: 35470662 DOI: 10.1021/acsnano.2c02326] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Transforming natural resources to energy sources, such as converting CH4 to H2 and carbon, at high efficiency and low cost is crucial for many industries and environmental sustainability. The high temperature requirement of CH4 conversion regarding many of the current methods remains a critical bottleneck for their practical uptake. Here we report an approach based on gallium (Ga) liquid metal droplets, Ni(OH)2 cocatalysts, and mechanical energy input that offers low-temperature and scalable CH4 conversion into H2 and carbon. Mainly driven by the triboelectric voltage, originating from the joint contributions of the cocatalysts during agitation, CH4 is converted at the Ga and Ni(OH)2 interface through nanotribo-electrochemical reaction pathways. The efficiency of the system is enhanced when the reaction is performed at an increased pressure. The dehydrogenation of other nongaseous hydrocarbons using this approach is also demonstrated. This technology presents a possible low energy route for CH4 conversion without involving high temperature and harsh operating conditions.
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Affiliation(s)
- Junma Tang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Jason A Scott
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Jianbo Tang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Mohammad B Ghasemian
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Maedehsadat Mousavi
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Jialuo Han
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Dorna Esrafilzadeh
- Graduate School of Biomedical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Khashayar Khoshmanesh
- School of Engineering, Royal Melbourne Institute of Technology (RMIT), Melbourne 3001, Australia
| | - Torben Daeneke
- School of Engineering, Royal Melbourne Institute of Technology (RMIT), Melbourne 3001, Australia
| | - Anthony P O'Mullane
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, Queensland 4001, Australia
| | - Richard B Kaner
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Material Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Md Arifur Rahim
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Kourosh Kalantar-Zadeh
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
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17
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Foller T, Madauß L, Ji D, Ren X, De Silva KKH, Musso T, Yoshimura M, Lebius H, Benyagoub A, Kumar PV, Schleberger M, Joshi R. Mass Transport via In-Plane Nanopores in Graphene Oxide Membranes. Nano Lett 2022; 22:4941-4948. [PMID: 35687040 DOI: 10.1021/acs.nanolett.2c01615] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Angstrom-confined solvents in 2D laminates can travel through interlayer spacings, through gaps between adjacent sheets, and via in-plane pores. Among these, experimental access to investigate the mass transport through in-plane pores is lacking. Our experiments allow an understanding of this mass transport via the controlled variation of oxygen functionalities, size and density of in-plane pores in graphene oxide membranes. Contrary to expectations, our transport experiments show that higher in-plane pore densities may not necessarily lead to higher water permeability. We observed that membranes with a high in-plane pore density but a low amount of oxygen functionalities exhibit a complete blockage of water. However, when water-ethanol mixtures with a weaker hydrogen network are used, these membranes show an enhanced permeation. Our combined experimental and computational results suggest that the transport mechanism is governed by the attraction of the solvents toward the pores with functional groups and hindered by the strong hydrogen network of water formed under angstrom confinement.
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Affiliation(s)
- Tobias Foller
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Lukas Madauß
- Faculty for Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, Germany
| | - Dali Ji
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Xiaojun Ren
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | | | - Tiziana Musso
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Masamichi Yoshimura
- Surface Science Laboratory, Toyota Technological Institute, Nagoya 468-8511, Japan
| | - Henning Lebius
- Normandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14032 Caen, France
| | - Abdenacer Benyagoub
- Normandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14032 Caen, France
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Marika Schleberger
- Faculty for Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, Germany
| | - Rakesh Joshi
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
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18
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Ma Z, Tsounis C, Toe CY, Kumar PV, Subhash B, Xi S, Yang HY, Zhou S, Lin Z, Wu KH, Wong RJ, Thomsen L, Bedford NM, Lu X, Ng YH, Han Z, Amal R. Reconstructing Cu Nanoparticle Supported on Vertical Graphene Surfaces via Electrochemical Treatment to Tune the Selectivity of CO 2 Reduction toward Valuable Products. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05431] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhipeng Ma
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Constantine Tsounis
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Cui Ying Toe
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Priyank V. Kumar
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Bijil Subhash
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Shibo Xi
- Institute of Chemical & Engineering Sciences, Agency for Science, Technology and Research, 1 Pesek Road, Singapore 627833, Singapore
| | - Hui Ying Yang
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, Singapore 138682, Singapore
| | - Shujie Zhou
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Zeheng Lin
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Kuang-Hsu Wu
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Roong Jien Wong
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
- Cambridge Centre for Advanced Research and Education, 1 CREATE Way, Singapore 138602 Singapore
| | - Lars Thomsen
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Nicholas M. Bedford
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Xunyu Lu
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Yun Hau Ng
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China
| | - Zhaojun Han
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, New South Wales 2070, Australia
- School of Mechanical and Manufacturing Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Rose Amal
- School of Chemical Engineering, The University of New South Wales, Kensington, New South Wales 2052, Australia
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19
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Mule AS, Mazzotti S, Rossinelli AA, Aellen M, Prins PT, van der Bok JC, Solari SF, Glauser YM, Kumar PV, Riedinger A, Norris DJ. Unraveling the Growth Mechanism of Magic-Sized Semiconductor Nanocrystals. J Am Chem Soc 2021; 143:2037-2048. [DOI: 10.1021/jacs.0c12185] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aniket S. Mule
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Sergio Mazzotti
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Aurelio A. Rossinelli
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Marianne Aellen
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - P. Tim Prins
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Johanna C. van der Bok
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Simon F. Solari
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Yannik M. Glauser
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Priyank V. Kumar
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Andreas Riedinger
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - David J. Norris
- Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
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20
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Madauß L, Foller T, Plaß J, Kumar PV, Musso T, Dunkhorst K, Joshi R, Schleberger M. Selective Proton Transport for Hydrogen Production Using Graphene Oxide Membranes. J Phys Chem Lett 2020; 11:9415-9420. [PMID: 33104361 DOI: 10.1021/acs.jpclett.0c02481] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Graphene oxide has shown exceptional properties in terms of water permeability and filtration characteristics. Here the suitability of graphene oxide membranes for the spatial separation of hydronium and hydroxide ions after photocatalytic water splitting is demonstrated. Instead of relying on classical size exclusion by adjusting the membrane laminates' interlayer spacings, nonmodified graphene oxide is used to exploit the presence of its natural functional groups and surface charges for filtration. Despite a significantly larger interlayer spacing inside the membrane compared with the size of the hydrated radii of the ions, highly asymmetric transport behavior and a 6 times higher mobility for hydronium than for hydroxide are observed. DFT simulations reveal that hydroxide ions are more prone to interact and stick to the functional groups of graphene oxide, while diffusion of hydronium ions through the membrane is less impeded and aligns well with the concept of the Grotthuss mechanism.
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Affiliation(s)
- Lukas Madauß
- Faculty of Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, Germany
| | - Tobias Foller
- School of Materials Science and Engineering, University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Jannik Plaß
- Faculty of Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, Germany
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Tiziana Musso
- School of Materials Science and Engineering, University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Kirsten Dunkhorst
- Faculty of Engineering and Physics, University of Duisburg-Essen, 47057 Duisburg, Germany
| | - Rakesh Joshi
- School of Materials Science and Engineering, University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Marika Schleberger
- Faculty of Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, Germany
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21
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Jia C, Ching K, Kumar PV, Zhao C, Kumar N, Chen X, Das B. Vitamin B 12 on Graphene for Highly Efficient CO 2 Electroreduction. ACS Appl Mater Interfaces 2020; 12:41288-41293. [PMID: 32809795 DOI: 10.1021/acsami.0c10125] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Combining the advantages of homogeneous and heterogeneous catalytic systems has emerged as a promising strategy for electrochemical CO2 reduction although developing robust, active, product-selective, and easily available, catalysts remains a major challenge. Herein, we report the electroreduction of CO2 catalyzed by cobalt and benzimidazole containing Vitamin B12 immobilized on the surface of reduced graphene oxide (rGO). This hybrid system with a naturally abundant molecular catalyst produces CO with high selectivity and a constant current density in an aqueous buffer solution (pH 7.2) for over 10 h. A Faradaic efficiency (FE) of 94.5% was obtained for converting CO2 to CO at an overpotential of 690 mV with a CO partial current density (jCO) of 6.24 mA cm-2 and a turnover frequency (TOF) of up to 28.6 s-1. A higher jCO (13.6 mA cm-2) and TOF (52.4 s-1) can be achieved with this system at a higher overpotential (790 mV) without affecting the product selectivity (∼94%) for CO formation. Our experimental findings are corroborated with density functional theory (DFT) studies to understand the influence of the covalently attached and redox-active benzimidazole unit. To the best of our knowledge, this is the first example of naturally abundant vitamin being immobilized on a conductive surface for highly efficient CO2 electroreduction.
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Affiliation(s)
- Chen Jia
- School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Karin Ching
- School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Chuan Zhao
- School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Naresh Kumar
- School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Xianjue Chen
- School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Biswanath Das
- School of Chemistry, University of New South Wales, Sydney 2052, Australia
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22
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Poerwoprajitno AR, Gloag L, Watt J, Cychy S, Cheong S, Kumar PV, Benedetti TM, Deng C, Wu K, Marjo CE, Huber DL, Muhler M, Gooding JJ, Schuhmann W, Wang D, Tilley RD. Faceted Branched Nickel Nanoparticles with Tunable Branch Length for High-Activity Electrocatalytic Oxidation of Biomass. Angew Chem Int Ed Engl 2020; 59:15487-15491. [PMID: 32449976 PMCID: PMC7497201 DOI: 10.1002/anie.202005489] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/20/2020] [Indexed: 01/08/2023]
Abstract
Controlling the formation of nanosized branched nanoparticles with high uniformity is one of the major challenges in synthesizing nanocatalysts with improved activity and stability. Using a cubic-core hexagonal-branch mechanism to form highly monodisperse branched nanoparticles, we vary the length of the nickel branches. Lengthening the nickel branches, with their high coverage of active facets, is shown to improve activity for electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF), as an example for biomass conversion.
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Affiliation(s)
| | - Lucy Gloag
- School of ChemistryThe University of New South WalesSydneyNSW2052Australia
| | - John Watt
- Center for Integrated NanotechnologiesLos Alamos National LaboratoryLos AlamosNM87545USA
| | - Steffen Cychy
- Industrial ChemistryFaculty of Chemistry and BiochemistryRuhr University BochumUniversitätsstr. 15044780BochumGermany
| | - Soshan Cheong
- Mark Wainwright Analytical CentreThe University of New South WalesSydneyNSW2052Australia
| | - Priyank V. Kumar
- School of Chemical EngineeringThe University of New South WalesSydneyNSW2052Australia
| | - Tania M. Benedetti
- School of ChemistryThe University of New South WalesSydneyNSW2052Australia
| | - Chen Deng
- School of Chemical EngineeringThe University of New South WalesSydneyNSW2052Australia
| | - Kuang‐Hsu Wu
- School of Chemical EngineeringThe University of New South WalesSydneyNSW2052Australia
| | - Christopher E. Marjo
- Mark Wainwright Analytical CentreThe University of New South WalesSydneyNSW2052Australia
| | - Dale L. Huber
- Center for Integrated NanotechnologiesSandia National LaboratoriesAlbuquerqueNM87185USA
| | - Martin Muhler
- Industrial ChemistryFaculty of Chemistry and BiochemistryRuhr University BochumUniversitätsstr. 15044780BochumGermany
| | - J. Justin Gooding
- School of ChemistryThe University of New South WalesSydneyNSW2052Australia
- Australian Centre for NanoMedicineThe University of New South WalesSydneyNSW2052Australia
| | - Wolfgang Schuhmann
- Analytical Chemistry—Center for Electrochemical Sciences (CES)Faculty of Chemistry and BiochemistryRuhr University BochumUniversitätsstr. 15044780BochumGermany
| | - Da‐Wei Wang
- School of Chemical EngineeringThe University of New South WalesSydneyNSW2052Australia
| | - Richard D. Tilley
- School of ChemistryThe University of New South WalesSydneyNSW2052Australia
- Mark Wainwright Analytical CentreThe University of New South WalesSydneyNSW2052Australia
- Australian Centre for NanoMedicineThe University of New South WalesSydneyNSW2052Australia
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23
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Poerwoprajitno AR, Gloag L, Watt J, Cychy S, Cheong S, Kumar PV, Benedetti TM, Deng C, Wu K, Marjo CE, Huber DL, Muhler M, Gooding JJ, Schuhmann W, Wang D, Tilley RD. Facettierte verzweigte Nickel‐Nanopartikel mit variierbarer Verzweigungslänge für die hochaktive elektrokatalytische Oxidation von Biomasse. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005489] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Lucy Gloag
- School of Chemistry The University of New South Wales Sydney NSW 2052 Australien
| | - John Watt
- Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Steffen Cychy
- Lehrstuhl für Technische Chemie, Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44780 Bochum Deutschland
| | - Soshan Cheong
- Mark Wainwright Analytical Centre The University of New South Wales Sydney NSW 2052 Australien
| | - Priyank V. Kumar
- School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australien
| | - Tania M. Benedetti
- School of Chemistry The University of New South Wales Sydney NSW 2052 Australien
| | - Chen Deng
- School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australien
| | - Kuang‐Hsu Wu
- School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australien
| | - Christopher E. Marjo
- Mark Wainwright Analytical Centre The University of New South Wales Sydney NSW 2052 Australien
| | - Dale L. Huber
- Center for Integrated Nanotechnologies Sandia National Laboratories Albuquerque NM 87185 USA
| | - Martin Muhler
- Lehrstuhl für Technische Chemie, Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44780 Bochum Deutschland
| | - J. Justin Gooding
- School of Chemistry The University of New South Wales Sydney NSW 2052 Australien
- Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australien
| | - Wolfgang Schuhmann
- Analytische Chemie – Zentrum für Elektrochemie (CES) Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44780 Bochum Deutschland
| | - Da‐Wei Wang
- School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australien
| | - Richard D. Tilley
- School of Chemistry The University of New South Wales Sydney NSW 2052 Australien
- Mark Wainwright Analytical Centre The University of New South Wales Sydney NSW 2052 Australien
- Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australien
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24
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Yang JW, Shen YC, Lin KC, Cheng SJ, Chen SL, Chen CY, Kumar PV, Lin SF, Lu HE, Chen GY. Organ-on-a-Chip: Opportunities for Assessing the Toxicity of Particulate Matter. Front Bioeng Biotechnol 2020; 8:519. [PMID: 32548105 PMCID: PMC7272695 DOI: 10.3389/fbioe.2020.00519] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 05/01/2020] [Indexed: 12/25/2022] Open
Abstract
Recent developments in epidemiology have confirmed that airborne particulates are directly associated with respiratory pathology and mortality. Although clinical studies have yielded evidence of the effects of many types of fine particulates on human health, it still does not have a complete understanding of how physiological reactions are caused nor to the changes and damages associated with cellular and molecular mechanisms. Currently, most health assessment studies of particulate matter (PM) are conducted through cell culture or animal experiments. The results of such experiments often do not correlate with clinical findings or actual human reactions, and they also cause difficulty when investigating the causes of air pollution and associated human health hazards, the analysis of biomarkers, and the development of future pollution control strategies. Microfluidic-based cell culture technology has considerable potential to expand the capabilities of conventional cell culture by providing high-precision measurement, considerably increasing the potential for the parallelization of cellular assays, ensuring inexpensive automation, and improving the response of the overall cell culture in a more physiologically relevant context. This review paper focuses on integrating the important respiratory health problems caused by air pollution today, as well as the development and application of biomimetic organ-on-a-chip technology. This more precise experimental model is expected to accelerate studies elucidating the effect of PM on the human body and to reveal new opportunities for breakthroughs in disease research and drug development.
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Affiliation(s)
- Jia-Wei Yang
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering National Chiao Tung University, Hsinchu, Taiwan.,Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Yu-Chih Shen
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan.,Ph.D. Degree Program of Biomedical Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Ko-Chih Lin
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering National Chiao Tung University, Hsinchu, Taiwan.,Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Sheng-Jen Cheng
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering National Chiao Tung University, Hsinchu, Taiwan.,Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Shiue-Luen Chen
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering National Chiao Tung University, Hsinchu, Taiwan.,Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Chong-You Chen
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering National Chiao Tung University, Hsinchu, Taiwan.,Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, Australia
| | - Shien-Fong Lin
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering National Chiao Tung University, Hsinchu, Taiwan.,Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Huai-En Lu
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu, Taiwan
| | - Guan-Yu Chen
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering National Chiao Tung University, Hsinchu, Taiwan.,Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan.,Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
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25
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Cheng SJ, Hsieh KY, Chen SL, Chen CY, Huang CY, Tsou HI, Kumar PV, Hsieh JCH, Chen GY. Microfluidics and Nanomaterial-based Technologies for Circulating Tumor Cell Isolation and Detection. Sensors (Basel) 2020; 20:E1875. [PMID: 32230996 PMCID: PMC7180594 DOI: 10.3390/s20071875] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/20/2020] [Accepted: 03/24/2020] [Indexed: 02/07/2023]
Abstract
Cancer has been one of the leading causes of death globally, with metastases and recurrences contributing to this result. The detection of circulating tumor cells (CTCs), which have been implicated as a major population of cells that is responsible for seeding and migration of tumor sites, could contribute to early detection of metastasis and recurrences, consequently increasing the chances of cure. This review article focuses on the current progress in microfluidics technology in CTCs diagnostics, extending to the use of nanomaterials and surface modification techniques for diagnostic applications, with an emphasis on the importance of integrating microchannels, nanomaterials, and surface modification techniques in the isolating and detecting of CTCs.
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Affiliation(s)
- Sheng-Jen Cheng
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan; (S.-J.C.); (K.Y.H.); (S.-L.C.); (C.-Y.C.); (C.-Y.H.); (H.-I.T.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Kuan Yu Hsieh
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan; (S.-J.C.); (K.Y.H.); (S.-L.C.); (C.-Y.C.); (C.-Y.H.); (H.-I.T.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Shiue-Luen Chen
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan; (S.-J.C.); (K.Y.H.); (S.-L.C.); (C.-Y.C.); (C.-Y.H.); (H.-I.T.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Chong-You Chen
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan; (S.-J.C.); (K.Y.H.); (S.-L.C.); (C.-Y.C.); (C.-Y.H.); (H.-I.T.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Chien-Yu Huang
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan; (S.-J.C.); (K.Y.H.); (S.-L.C.); (C.-Y.C.); (C.-Y.H.); (H.-I.T.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Hung-I Tsou
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan; (S.-J.C.); (K.Y.H.); (S.-L.C.); (C.-Y.C.); (C.-Y.H.); (H.-I.T.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Priyank V. Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia;
| | - Jason Chia-Hsun Hsieh
- Division of Haematology/Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital (Linkou), Taoyuan 333, Taiwan
| | - Guan-Yu Chen
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan; (S.-J.C.); (K.Y.H.); (S.-L.C.); (C.-Y.C.); (C.-Y.H.); (H.-I.T.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 30010, Taiwan
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26
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Kuznetsov DA, Naeem MA, Kumar PV, Abdala PM, Fedorov A, Müller CR. Tailoring Lattice Oxygen Binding in Ruthenium Pyrochlores to Enhance Oxygen Evolution Activity. J Am Chem Soc 2020; 142:7883-7888. [DOI: 10.1021/jacs.0c01135] [Citation(s) in RCA: 115] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Denis A. Kuznetsov
- Department of Mechanical and Process Engineering, ETH Zürich, CH 8092 Zürich, Switzerland
| | - Muhammad A. Naeem
- Department of Mechanical and Process Engineering, ETH Zürich, CH 8092 Zürich, Switzerland
| | - Priyank V. Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Paula M. Abdala
- Department of Mechanical and Process Engineering, ETH Zürich, CH 8092 Zürich, Switzerland
| | - Alexey Fedorov
- Department of Mechanical and Process Engineering, ETH Zürich, CH 8092 Zürich, Switzerland
| | - Christoph R. Müller
- Department of Mechanical and Process Engineering, ETH Zürich, CH 8092 Zürich, Switzerland
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27
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Lee KM, Hawi ZH, Parkington HC, Parish CL, Kumar PV, Polo JM, Bellgrove MA, Tong J. The application of human pluripotent stem cells to model the neuronal and glial components of neurodevelopmental disorders. Mol Psychiatry 2020; 25:368-378. [PMID: 31455859 DOI: 10.1038/s41380-019-0495-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 05/19/2019] [Accepted: 06/24/2019] [Indexed: 12/24/2022]
Abstract
Cellular models of neurodevelopmental disorders provide a valuable experimental system to uncover disease mechanisms and novel therapeutic strategies. The ability of induced pluripotent stem cells (iPSCs) to generate diverse brain cell types offers great potential to model several neurodevelopmental disorders. Further patient-derived iPSCs have the unique genetic and molecular signature of the affected individuals, which allows researchers to address limitations of transgenic behavioural models, as well as generate hypothesis-driven models to study disorder-relevant phenotypes at a cellular level. In this article, we review the extant literature that has used iPSC-based modelling to understand the neuronal and glial contributions to neurodevelopmental disorders including autism spectrum disorder (ASD), Rett syndrome, bipolar disorder (BP), and schizophrenia. For instance, several molecular candidates have been shown to influence cellular phenotypes in three-dimensional iPSC-based models of ASD patients. Delays in differentiation of astrocytes and morphological changes of neurons are associated with Rett syndrome. In the case of bipolar disorders and schizophrenia, patient-derived models helped to identify cellular phenotypes associated with neuronal deficits (e.g., excitability) and mutation-specific abnormalities in oligodendrocytes (e.g., CSPG4). Further we provide a critical review of the current limitations of this field and provide methodological suggestions to enhance future modelling efforts of neurodevelopmental disorders. Future developments in experimental design and methodology of disease modelling represent an exciting new avenue relevant to neurodevelopmental disorders.
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Affiliation(s)
- K M Lee
- Turner Institute for Brain and Mental Health and the School of Psychological Sciences, Monash University, Melbourne, Australia
| | - Z H Hawi
- Turner Institute for Brain and Mental Health and the School of Psychological Sciences, Monash University, Melbourne, Australia
| | - H C Parkington
- Biomedicine Discovery Institute, Monash University, Melbourne, Australia
| | - C L Parish
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - P V Kumar
- Turner Institute for Brain and Mental Health and the School of Psychological Sciences, Monash University, Melbourne, Australia
| | - J M Polo
- Biomedicine Discovery Institute, Monash University, Melbourne, Australia
| | - M A Bellgrove
- Turner Institute for Brain and Mental Health and the School of Psychological Sciences, Monash University, Melbourne, Australia
| | - J Tong
- Turner Institute for Brain and Mental Health and the School of Psychological Sciences, Monash University, Melbourne, Australia.
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28
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Chen SL, Chen CY, Hsieh JCH, Yu ZY, Cheng SJ, Hsieh KY, Yang JW, Kumar PV, Lin SF, Chen GY. Graphene Oxide-Based Biosensors for Liquid Biopsies in Cancer Diagnosis. Nanomaterials (Basel) 2019; 9:E1725. [PMID: 31816919 PMCID: PMC6956293 DOI: 10.3390/nano9121725] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 11/25/2019] [Accepted: 11/25/2019] [Indexed: 12/12/2022]
Abstract
Liquid biopsies use blood or urine as test samples, which are able to be continuously collected in a non-invasive manner. The analysis of cancer-related biomarkers such as circulating tumor cells (CTCs), circulating tumor DNA (ctDNA), microRNA, and exosomes provides important information in early cancer diagnosis, tumor metastasis detection, and postoperative recurrence monitoring assist with clinical diagnosis. However, low concentrations of some tumor markers, such as CTCs, ctDNA, and microRNA, in the blood limit its applications in clinical detection and analysis. Nanomaterials based on graphene oxide have good physicochemical properties and are now widely used in biomedical detection technologies. These materials have properties including good hydrophilicity, mechanical flexibility, electrical conductivity, biocompatibility, and optical performance. Moreover, utilizing graphene oxide as a biosensor interface has effectively improved the sensitivity and specificity of biosensors for cancer detection. In this review, we discuss various cancer detection technologies regarding graphene oxide and discuss the prospects and challenges of this technology.
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Affiliation(s)
- Shiue-Luen Chen
- Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan; (S.-L.C.); (C.-Y.C.); (Z.-Y.Y.); (S.-J.C.); (K.Y.H.); (J.-W.Y.); (S.-F.L.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Chong-You Chen
- Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan; (S.-L.C.); (C.-Y.C.); (Z.-Y.Y.); (S.-J.C.); (K.Y.H.); (J.-W.Y.); (S.-F.L.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Jason Chia-Hsun Hsieh
- Division of Haematology/Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital (Linkou), Taoyuan 333, Taiwan;
| | - Zih-Yu Yu
- Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan; (S.-L.C.); (C.-Y.C.); (Z.-Y.Y.); (S.-J.C.); (K.Y.H.); (J.-W.Y.); (S.-F.L.)
| | - Sheng-Jen Cheng
- Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan; (S.-L.C.); (C.-Y.C.); (Z.-Y.Y.); (S.-J.C.); (K.Y.H.); (J.-W.Y.); (S.-F.L.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Kuan Yu Hsieh
- Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan; (S.-L.C.); (C.-Y.C.); (Z.-Y.Y.); (S.-J.C.); (K.Y.H.); (J.-W.Y.); (S.-F.L.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Jia-Wei Yang
- Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan; (S.-L.C.); (C.-Y.C.); (Z.-Y.Y.); (S.-J.C.); (K.Y.H.); (J.-W.Y.); (S.-F.L.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia;
| | - Shien-Fong Lin
- Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan; (S.-L.C.); (C.-Y.C.); (Z.-Y.Y.); (S.-J.C.); (K.Y.H.); (J.-W.Y.); (S.-F.L.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Guan-Yu Chen
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan
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29
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Kuznetsov DA, Chen Z, Kumar PV, Tsoukalou A, Kierzkowska A, Abdala PM, Safonova OV, Fedorov A, Müller CR. Single Site Cobalt Substitution in 2D Molybdenum Carbide (MXene) Enhances Catalytic Activity in the Hydrogen Evolution Reaction. J Am Chem Soc 2019; 141:17809-17816. [DOI: 10.1021/jacs.9b08897] [Citation(s) in RCA: 157] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Denis A. Kuznetsov
- ETH Zürich, Department of Mechanical and Process Engineering, CH 8092 Zürich, Switzerland
| | - Zixuan Chen
- ETH Zürich, Department of Mechanical and Process Engineering, CH 8092 Zürich, Switzerland
| | - Priyank V. Kumar
- University of New South Wales, School of Chemical Engineering, Sydney, New South Wales 2052, Australia
| | - Athanasia Tsoukalou
- ETH Zürich, Department of Mechanical and Process Engineering, CH 8092 Zürich, Switzerland
| | - Agnieszka Kierzkowska
- ETH Zürich, Department of Mechanical and Process Engineering, CH 8092 Zürich, Switzerland
| | - Paula M. Abdala
- ETH Zürich, Department of Mechanical and Process Engineering, CH 8092 Zürich, Switzerland
| | | | - Alexey Fedorov
- ETH Zürich, Department of Mechanical and Process Engineering, CH 8092 Zürich, Switzerland
| | - Christoph R. Müller
- ETH Zürich, Department of Mechanical and Process Engineering, CH 8092 Zürich, Switzerland
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30
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31
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Thangamuthu M, Hsieh KY, Kumar PV, Chen GY. Graphene- and Graphene Oxide-Based Nanocomposite Platforms for Electrochemical Biosensing Applications. Int J Mol Sci 2019; 20:E2975. [PMID: 31216691 PMCID: PMC6628170 DOI: 10.3390/ijms20122975] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 06/01/2019] [Accepted: 06/04/2019] [Indexed: 12/14/2022] Open
Abstract
Graphene and its derivatives such as graphene oxide (GO) and reduced GO (rGO) offer excellent electrical, mechanical and electrochemical properties. Further, due to the presence of high surface area, and a rich oxygen and defect framework, they are able to form nanocomposites with metal/semiconductor nanoparticles, metal oxides, quantum dots and polymers. Such nanocomposites are becoming increasingly useful as electrochemical biosensing platforms. In this review, we present a brief introduction on the aforementioned graphene derivatives, and discuss their synthetic strategies and structure-property relationships important for biosensing. We then highlight different nanocomposite platforms that have been developed for electrochemical biosensing, introducing enzymatic biosensors, followed by non-enzymatic biosensors and immunosensors. Additionally, we briefly discuss their role in the emerging field of biomedical cell capture. Finally, a brief outlook on these topics is presented.
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Affiliation(s)
- Madasamy Thangamuthu
- Nanophotonics and Metrology Laboratory (NAM), Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Kuan Yu Hsieh
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
| | - Priyank V Kumar
- School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Guan-Yu Chen
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
- Department of Biological Science and Technology, College of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan.
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Kumar PV, Rossi TP, Marti-Dafcik D, Reichmuth D, Kuisma M, Erhart P, Puska MJ, Norris DJ. Plasmon-Induced Direct Hot-Carrier Transfer at Metal-Acceptor Interfaces. ACS Nano 2019; 13:3188-3195. [PMID: 30768238 DOI: 10.1021/acsnano.8b08703] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Plasmon-induced hot-carrier transfer from a metal nanostructure to an acceptor is known to occur via two key mechanisms: (i) indirect transfer, where the hot carriers are produced in the metal nanostructure and subsequently transferred to the acceptor, and (ii) direct transfer, where the plasmons decay by directly exciting carriers from the metal to the acceptor. Unfortunately, an atomic-level understanding of the direct-transfer process, especially with regard to its quantification, remains elusive even though it is estimated to be more efficient compared to the indirect-transfer process. This is due to experimental challenges in separating direct from indirect transfer as both processes occur simultaneously at femtosecond time scales. Here, we employ time-dependent density-functional theory simulations to isolate and study the direct-transfer process at a model metal-acceptor (Ag147-Cd33Se33) interface. Our simulations show that, for a 10 fs Gaussian laser pulse tuned to the plasmon frequency, the plasmon formed in the Ag147-Cd33Se33 system decays within 10 fs and induces the direct transfer with a probability of about 40%. We decompose the direct-transfer process further and demonstrate that the direct injection of both electrons and holes into the acceptor, termed direct hot-electron transfer (DHET) and direct hot-hole transfer (DHHT), takes place with similar probabilities of about 20% each. Finally, effective strategies to control and tune the probabilities of DHET and DHHT processes are proposed. We envision our work to provide guidelines toward the design of metal-acceptor interfaces that enable more efficient plasmonic hot-carrier devices.
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Affiliation(s)
- Priyank V Kumar
- Optical Materials Engineering Laboratory , ETH Zurich , 8092 Zurich , Switzerland
| | - Tuomas P Rossi
- Department of Physics , Chalmers University of Technology , 41296 Gothenburg , Sweden
- Department of Applied Physics , Aalto University , 00076 Aalto , Finland
| | - Daniel Marti-Dafcik
- Optical Materials Engineering Laboratory , ETH Zurich , 8092 Zurich , Switzerland
| | - Daniel Reichmuth
- Optical Materials Engineering Laboratory , ETH Zurich , 8092 Zurich , Switzerland
| | - Mikael Kuisma
- Department of Chemistry, Nanoscience Center , University of Jyväskylä , 40014 Jyväskylä , Finland
| | - Paul Erhart
- Department of Physics , Chalmers University of Technology , 41296 Gothenburg , Sweden
| | - Martti J Puska
- Department of Applied Physics , Aalto University , 00076 Aalto , Finland
| | - David J Norris
- Optical Materials Engineering Laboratory , ETH Zurich , 8092 Zurich , Switzerland
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Abstract
An ab initio computational study of direct hot-carrier transfer at metal–molecule interfaces with relevance to plasmonic catalysis.
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Affiliation(s)
- Priyank V. Kumar
- Optical Materials Engineering Laboratory
- ETH Zurich
- 8092 Zurich
- Switzerland
| | - Tuomas P. Rossi
- Department of Physics
- Chalmers University of Technology
- 41296 Gothenburg
- Sweden
| | - Mikael Kuisma
- Department of Chemistry
- Nanoscience Center
- University of Jyväskylä
- 40014 Jyväskylä
- Finland
| | - Paul Erhart
- Department of Physics
- Chalmers University of Technology
- 41296 Gothenburg
- Sweden
| | - David J. Norris
- Optical Materials Engineering Laboratory
- ETH Zurich
- 8092 Zurich
- Switzerland
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Cheng SJ, Chiu HY, Kumar PV, Hsieh KY, Yang JW, Lin YR, Shen YC, Chen GY. Simultaneous drug delivery and cellular imaging using graphene oxide. Biomater Sci 2018; 6:813-819. [PMID: 29417098 DOI: 10.1039/c7bm01192j] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Graphene oxide (GO), a derivative of graphene, and its related nanomaterials have attracted much attention in recent years due to the excellent biocompatibility and large surface area of GO with abundant oxygen functional groups, which further enable it to serve as a nano-bio interface. Herein, we demonstrate the induction of blue fluorescence in GO suspensions via a mild thermal annealing procedure. Additionally, this procedure preserves the oxygen functional groups on the graphene plane which enables the conjugation of cancer drugs without obvious cytotoxicity. Consequently, we demonstrate the capability of GO to simultaneously play the dual-role of a: (i) cellular imaging agent and (ii) drug delivery agent in CT26 cancer cells without the need for additional fluorescent protein labeling. Our method offers a simple, controllable strategy to tune and enhance the fluorescence property of GO, which shows potential for biomedical applications and fundamental studies.
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Affiliation(s)
- Sheng-Jen Cheng
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan 30010.
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Yang JW, Hsieh KY, Kumar PV, Cheng SJ, Lin YR, Shen YC, Chen GY. Enhanced Osteogenic Differentiation of Stem Cells on Phase-Engineered Graphene Oxide. ACS Appl Mater Interfaces 2018; 10:12497-12503. [PMID: 29601178 DOI: 10.1021/acsami.8b02225] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Graphene oxide (GO) has attracted significant interest as a template material for multiple applications due to its two-dimensional nature and established functionalization chemistries. However, for applications toward stem cell culture and differentiation, GO is often reduced to form reduced graphene oxide, resulting in a loss of oxygen content. Here, we induce a phase transformation in GO and demonstrate its benefits for enhanced stem cell culture and differentiation while conserving the oxygen content. The transformation results in the clustering of oxygen atoms on the GO surface, which greatly improves its ability toward substance adherence and results in enhanced differentiation of human mesenchymal stem cells toward the osteogenic lineage. Moreover, the conjugating ability of modified GO strengthened, which was examined by auxiliary osteogenic growth peptide conjugation. Overall, our work demonstrates GO's potential for stem cell applications while maintaining its oxygen content, which could enable further functionalization and fabrication of novel nano-biointerfaces.
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Affiliation(s)
| | | | - Priyank V Kumar
- Optical Materials Engineering Laboratory , ETH Zurich , Zurich 8092 , Switzerland
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Affiliation(s)
- Priyank V. Kumar
- Optical Materials Engineering
Laboratory, ETH Zurich, 8092 Zurich, Switzerland
| | - David J. Norris
- Optical Materials Engineering
Laboratory, ETH Zurich, 8092 Zurich, Switzerland
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Bardhan NM, Kumar PV, Li Z, Ploegh HL, Grossman JC, Belcher AM, Chen GY. Enhanced Cell Capture on Functionalized Graphene Oxide Nanosheets through Oxygen Clustering. ACS Nano 2017; 11:1548-1558. [PMID: 28085249 PMCID: PMC5804333 DOI: 10.1021/acsnano.6b06979] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
With the global rise in incidence of cancer and infectious diseases, there is a need for the development of techniques to diagnose, treat, and monitor these conditions. The ability to efficiently capture and isolate cells and other biomolecules from peripheral whole blood for downstream analyses is a necessary requirement. Graphene oxide (GO) is an attractive template nanomaterial for such biosensing applications. Favorable properties include its two-dimensional architecture and wide range of functionalization chemistries, offering significant potential to tailor affinity toward aromatic functional groups expressed in biomolecules of interest. However, a limitation of current techniques is that as-synthesized GO nanosheets are used directly in sensing applications, and the benefits of their structural modification on the device performance have remained unexplored. Here, we report a microfluidic-free, sensitive, planar device on treated GO substrates to enable quick and efficient capture of Class-II MHC-positive cells from murine whole blood. We achieve this by using a mild thermal annealing treatment on the GO substrates, which drives a phase transformation through oxygen clustering. Using a combination of experimental observations and MD simulations, we demonstrate that this process leads to improved reactivity and density of functionalization of cell capture agents, resulting in an enhanced cell capture efficiency of 92 ± 7% at room temperature, almost double the efficiency afforded by devices made using as-synthesized GO (54 ± 3%). Our work highlights a scalable, cost-effective, general approach to improve the functionalization of GO, which creates diverse opportunities for various next-generation device applications.
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Affiliation(s)
- Neelkanth M. Bardhan
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Priyank V. Kumar
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Zeyang Li
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02139, United States
| | - Hidde L. Ploegh
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02139, United States
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jeffrey C. Grossman
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Corresponding Authors: . .
| | - Angela M. Belcher
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Corresponding Authors: . .
| | - Guan-Yu Chen
- Institute of Biomedical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 30010, Taiwan
- Corresponding Authors: . .
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Chen GY, Li Z, Theile CS, Bardhan NM, Kumar PV, Duarte JN, Maruyama T, Rashidfarrokh A, Belcher AM, Ploegh HL. Graphene Oxide Nanosheets Modified with Single-Domain Antibodies for Rapid and Efficient Capture of Cells. Chemistry 2015; 21:17178-83. [PMID: 26472062 PMCID: PMC4715744 DOI: 10.1002/chem.201503057] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Indexed: 02/01/2023]
Abstract
Peripheral blood can provide valuable information on an individual's immune status. Cell-based assays typically target leukocytes and their products. Characterization of leukocytes from whole blood requires their separation from the far more numerous red blood cells.1 Current methods to classify leukocytes, such as recovery on antibody-coated beads or fluorescence-activated cell sorting require long sample preparation times and relatively large sample volumes.2 A simple method that enables the characterization of cells from a small peripheral whole blood sample could overcome limitations of current analytical techniques. We describe the development of a simple graphene oxide surface coated with single-domain antibody fragments. This format allows quick and efficient capture of distinct WBC subpopulations from small samples (∼30 μL) of whole blood in a geometry that does not require any specialized equipment such as cell sorters or microfluidic devices.
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Affiliation(s)
- Guan-Yu Chen
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142 (USA)
- Present address: Institute of Biomedical Engineering, National Chiao Tung University, Hsinchu 30010 (Taiwan)
| | - Zeyang Li
- Department of Chemistry, Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (USA)
| | | | - Neelkanth M Bardhan
- Department of Materials Science and Engineering, The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (USA)
| | - Priyank V Kumar
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139 (USA)
| | - Joao N Duarte
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142 (USA)
| | - Takeshi Maruyama
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142 (USA)
| | - Ali Rashidfarrokh
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142 (USA)
| | - Angela M Belcher
- Department of Materials Science and Engineering, Department of Biological Engineering, The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (USA)
| | - Hidde L Ploegh
- Department of Biology, Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, Cambridge, MA 02142 (USA).
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Musso T, Kumar PV, Foster AS, Grossman JC. Graphene oxide as a promising hole injection layer for MoS₂-based electronic devices. ACS Nano 2014; 8:11432-11439. [PMID: 25347209 DOI: 10.1021/nn504507u] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The excellent physical and semiconducting properties of transition metal dichalcogenide (TMDC) monolayers make them promising materials for many applications. The TMDC monolayer MoS2 has gained significant attention as a channel material for next-generation transistors. However, while n-type single-layer MoS2 devices can be made with relative ease, fabrication of p-type transistors remains a challenge as the Fermi-level of elemental metals used as contacts are pinned close to the conduction band leading to large p-type Schottky barrier heights (SBH). Here, we propose the utilization of graphene oxide (GO) as an efficient hole injection layer for single-layer MoS2-based electronic and optoelectronic devices. Using first-principles computations, we demonstrate that GO forms a p-type contact with monolayer MoS2, and that the p-type SBH can be made smaller by increasing the oxygen concentration and the fraction of epoxy functional groups in GO. Our analysis shows that this is possible due to the high work function of GO and the relatively weak Fermi-level pinning at the MoS2/GO interfaces compared to traditional MoS2/metal systems (common metals are Ag, Al, Au, Ir, Pd, Pt). The combination of easy-to-fabricate and inexpensive GO with MoS2 could be promising for the development of hybrid all-2D p-type electronic and optoelectronic devices on flexible substrates.
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Affiliation(s)
- Tiziana Musso
- COMP, Department of Applied Physics, Aalto University School of Science , Espoo 00076, Finland
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Affiliation(s)
- M H Anbardar
- Department of Pathology, Colorectal Research Centre, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - P V Kumar
- Department of Pathology, Colorectal Research Centre, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - S V Hosseini
- Department of Surgery, Colorectal Research Centre, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
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Mokhtari M, Kumar PV, Salimi A. A study to demonstrate the use of FNA cytology rather than biopsy in the diagnosis of neonatal biliary atresia. Cytopathology 2013; 25:336-9. [PMID: 24329590 DOI: 10.1111/cyt.12122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/01/2013] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To study the use of fine needle aspiration (FNA) cytology in neonatal biliary atresia (BA). METHODS Twelve female and nine male patients (age range, 3-7 months; mean age, 4.5 months) with a pre-operative diagnosis of BA, who were scheduled for Kasia portoenterostomy and selected for intraoperative FNA, were studied. RESULTS Cholestasis, bile deposits, bile infarcts, hepatitic rosettes enclosing bile plugs, feathery degeneration of hepatocytes and inflammatory cells were seen in the cytological slides. Bile infarcts, rosette formation and inflammatory cells were mainly noticed in type 3 BA. Bile infarcts and hepatitic rosettes are surrogate findings for the diagnosis of the obstructive type of cholestasis. CONCLUSION With the help of imaging studies, FNA in a multidisciplinary setting can be diagnostic of neonatal BA when cytological features suggest the obstructive nature of cholestasis, but this procedure cannot replace completely liver biopsy for this diagnosis.
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Affiliation(s)
- M Mokhtari
- Department of Pathology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Kumar PV, Bardhan NM, Tongay S, Wu J, Belcher AM, Grossman JC. Scalable enhancement of graphene oxide properties by thermally driven phase transformation. Nat Chem 2013; 6:151-8. [DOI: 10.1038/nchem.1820] [Citation(s) in RCA: 268] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 11/08/2013] [Indexed: 12/22/2022]
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Kumar PV, Bernardi M, Grossman JC. The impact of functionalization on the stability, work function, and photoluminescence of reduced graphene oxide. ACS Nano 2013; 7:1638-45. [PMID: 23368710 DOI: 10.1021/nn305507p] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Reduced graphene oxide (rGO) is a promising material for a variety of thin-film optoelectronic applications. Two main barriers to its widespread use are the lack of (1) fabrication protocols leading to tailored functionalization of the graphene sheet with oxygen-containing chemical groups, and (2) understanding of the impact of such functional groups on the stability and on the optical and electronic properties of rGO. We carry out classical molecular dynamics and density functional theory calculations on a large set of realistic rGO structures to decompose the effects of different functional groups on the stability, work function, and photoluminescence. Our calculations indicate the metastable nature of carbonyl-rich rGO and its favorable transformation to hydroxyl-rich rGO at room temperature via carbonyl-to-hydroxyl conversion reactions near carbon vacancies and holes. We demonstrate a significant tunability in the work function of rGO up to 2.5 eV by altering the composition of oxygen-containing functional groups for a fixed oxygen concentration, and of the photoluminescence emission by modulating the fraction of epoxy and carbonyl groups. Taken together, our results guide the application of tailored rGO structures in devices for optoelectronics and renewable energy.
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Affiliation(s)
- Priyank V Kumar
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge Massachusetts 02139-4307, USA
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Abstract
Carbon materials are excellent candidates for photovoltaic solar cells: they are Earth-abundant, possess high optical absorption, and maintain superior thermal and photostability. Here we report on solar cells with active layers made solely of carbon nanomaterials that present the same advantages of conjugated polymer-based solar cells, namely, solution processable, potentially flexible, and chemically tunable, but with increased photostability and the possibility to revert photodegradation. The device active layer composition is optimized using ab initio density functional theory calculations to predict type-II band alignment and Schottky barrier formation. The best device fabricated is composed of PC(70)BM fullerene, semiconducting single-walled carbon nanotubes, and reduced graphene oxide. This active-layer composition achieves a power conversion efficiency of 1.3%-a record for solar cells based on carbon as the active material-and we calculate efficiency limits of up to 13% for the devices fabricated in this work, comparable to those predicted for polymer solar cells employing PCBM as the acceptor. There is great promise for improving carbon-based solar cells considering the novelty of this type of device, the high photostability, and the availability of a large number of carbon materials with yet untapped potential for photovoltaics. Our results indicate a new strategy for efficient carbon-based, solution-processable, thin film, photostable solar cells.
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Affiliation(s)
- Marco Bernardi
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, USA
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Selvam TP, Karthick V, Kumar PV, Ali MA. Synthesis and structure-activity relationship study of 2-(substituted benzylidene)-7-(4-fluorophenyl)-5-(furan-2-yl)-2H-thiazolo[3,2-a]pyrimidin-3(7H)-one derivatives as anticancer agents. Drug Discov Ther 2012; 6:198-204. [PMID: 23006990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The synthesis and structure-activity relationship (SAR) study of a series of 2-(substituted benzylidene)-7-(4-fluorophenyl)-5-(furan-2-yl)-2H-thiazolo[3,2-a]pyrimidin-3(7H)-one (4a-4j) derivatives as anticancer agents are described. This series of thiazolopyrimidines were synthesized by the reaction of 7-(4-fluoro phenyl)-5-(furan-2-yl)-2H-thiazolo[3,2-a] pyrimidin-3(7H)-one (3) with appropriate substituted aldehydes in the presence of anhydrous sodium acetate and glacial acetic acid. Their structures were confirmed by IR, (1)H-NMR, mass, and elemental analyses. These novel thiazolopyrimidine derivatives were screened for their anticancer activity on the U937 human histocytic lymphoma cell line by 3-(4,5-dimethyl thiazole-2-yl)-2,5-diphenyltetrazoliumbromide (MTT) assay. The comparison of anticancer activity of thiazolopyrimidine was performed considering their structures. This study was done using 2-(substituted benzylidene)-7-(4-fluorophenyl)-5-(furan-2-yl)-2H-thiazolo[3,2-a]pyrimidin-3(7H)-one (4a-4j) as a basic model, showing that i) presence of a hydrogen donor/acceptor domain [thiazolo[3,2-a]pyrimidin-3(7H)-one] on the thiazolopyrimidine ring; ii) presence of a hydrophobic [(4-fluorophenyl)] aryl ring system on the thiazolopyrimidine ring; iii) presence of an electron donor moiety [5-(furan-2-yl)] on the thiazolopyrimidine ring; iv) ortho and para substitution of the distal aryl ring [2-(substituted benzylidene)] function strongly influenced anticancer activity. Among these compounds (4a-4j) para substituted derivatives 4c, 4e, 4f, 4g, 4h, and 4j showed significant anticancer activity.
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Affiliation(s)
- T P Selvam
- Department of Pharmaceutical Chemistry, PES's Rajaram and Tarabai Bandekar College of Pharmacy, Ponda, Goa, India.
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Selvam TP, Kumar PV. Synthesis, characterization, and anthelmintic activity of novel 6,7,8,9-tetrahydro-5H-5-phenyl-2-benzylidine-3-substituted hydrazino thiazolo (2,3-b) quinazoline derivatives and analogues. Drug Discov Ther 2010; 4:392-8. [PMID: 22491303 DOI: pmid/22491303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Several novel 6,7,8,9-tetrahydro-5H-5-phenyl-2-benzylidine-3-substituted hydrazine thiazolo (2,3-b) quinazoline derivatives were synthesized and evaluated for their anthelmintic activity in a passive avoidance test. Chemical structures of all of the newly synthesized compounds were confirmed by infrared spectroscopy, (1)H-nuclear magnetic resonance, mass spectroscopy, and elemental analyses. Out of 15 compounds, only 6e and 6o had good anthelmintic activity. Experimental data led to the conclusion that the synthesized compounds have anthelmintic activity.
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Affiliation(s)
- T P Selvam
- Department of Biotechnology, Acharya Nagarjuna University, Guntur, Andhrapradesh, India
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Faramarzi A, Ashraf MJ, Hashemi B, Heydari ST, Saif I, Azarpira N, Shishegar M, Eghtedari F, Khademi B, Kaviani M, Kumar PV. Histopathological screening of tonsillectomy and/or adenoidectomy specimens: a report from southern Iran. Int J Pediatr Otorhinolaryngol 2009; 73:1576-9. [PMID: 19733922 DOI: 10.1016/j.ijporl.2009.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2009] [Revised: 07/26/2009] [Accepted: 08/09/2009] [Indexed: 11/18/2022]
Abstract
BACKGROUND The need for pathologic examination of all tonsillectomy and/or adenoidectomy (T&A) specimens is controversial. Microscopic pathologic examination of these specimens is costly, but neglecting this step may miss diagnoses of significant diseases, especially malignancies. This study was designed to determine the rate of unexpected malignancies among patients who underwent T&A. METHODS All patients who underwent T&A at Shiraz University of Medical Sciences between February 2004 and February 2008 were included in a prospective study. Gross and microscopic pathologic examinations were done on all the specimens. The charts of the patients with significant pathological finding were reviewed. Information about pre-operative signs, symptoms, and risk factors were used to verify unexpected pathologic findings. RESULTS A total of 5058 patients were included. The age distribution was 10 months to 92 years (mean 14.0 years). There were 2498 males (49.4) and 2560 females (50.6%). Significant pathological findings were detected in 54 patients (1%). One unexpected malignancy (0.019%) was found in an adult patient. No unexpected malignancies were found in pediatric patients. CONCLUSIONS All T&A specimens in the adult population should be sent for microscopic pathological examination. Also specimens of nonroutine T&A in children (with positive findings in the medical history or on physical examination) should be sent for microscopic pathological examination. In children without positive findings in their history or on physical examination, gross pathological evaluation of routine T&A specimens by a pathologist is sufficient.
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Affiliation(s)
- A Faramarzi
- Department of Otolaryngology Head-Neck Surgery, Shiraz University of Medical Sciences, Shiraz, Iran.
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Pandey K, Kumar PV, Suryanarayana MV, Natarajan V. Absolute frequency determination of the 5P3/2-->7S1/2 transition in 87Rb. Opt Lett 2008; 33:1675-1677. [PMID: 18670500 DOI: 10.1364/ol.33.001675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report the absolute frequency of the important 5S(1/2)-->7S(1/2) two-photon transition in (87)Rb. We access the upper state using two dipole-allowed transitions via the intermediate 5P(3/2) state. This allows us to use much lower laser intensities compared to directly driving the two-photon transition, thereby avoiding potential errors due to the AC Stark shift. Collisional shifts are also minimized because the atomic density required is several orders of magnitude smaller. Our values are consistent with earlier frequency-comb measurements.
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Affiliation(s)
- Kanhaiya Pandey
- Department of Physics, Indian Institute of Science, Bangalore 560 012, India
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Abstract
OBJECTIVE To study fine needle aspiration (FNA) cytological findings of splenic lesions and assess the role of FNA in the diagnosis of splenomegaly or splenic tumours. METHODS This study consisted of 48 cases, 25 males and 23 females. The ages ranged between 3 and 71 years. Most of these cases were aspirated under ultrasonographic guidance and a small number were also aspirated directly by using a 22- to 23-gauge needles. The smears were stained with Wright-Giemsa and Papanicolaou methods. Special stains were used whenever necessary. RESULTS In this study 14 cases were diagnosed as lymphoma-leukaemia, 7 cases as tuberculosis, 12 cases as kala-azar, 2 cases as hydatid cyst, 3 cases as storage diseases, 3 cases as simple cyst, 2 cases as myeloproliferative disorders, 2 cases as malignant tumours and 3 cases as hamartomas (these were wrongly diagnosed as malignant tumours). CONCLUSION Splenic aspiration is a safe procedure and is very useful in the diagnosis of parasitic and infectious diseases, especially in endemic countries like Iran.
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Affiliation(s)
- P V Kumar
- Department of Pathology, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran.
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Abstract
OBJECTIVE Assessment of the nutritional status among 309 Kamar children (161 boys and 148 girls) aged 4-12 years. METHODS In this cross-sectional study, 24-hours dietary recall method was used to assess dietary intakes of children. Height and weight were recorded and children were classified by WHO criterion (Z-score) using nutritional indices i.e. weight for age, height for age and weight for height. NCHS data were used as reference. Mean energy and protein intake per day were measured and compared with Recommended Dietary Allowances (RDA) of Indian standards. RESULTS More than 90 percent of children (both boys and girls) in the age group of 4-6 years suffered by underweight (<-2 SD weight for age), which was comparatively lower in 7-9 and 10-12 years age group children. 84.51 percent of boys suffered by stunting (<-2 SD height for age), which was much higher than girls (47.54%) in 4-6 years age group. Similarly, 80 percent of 4-6 years age group children were affected by wasting (<-2 SD weight for height). The consumption of energy and protein were also much lower among Kamar children than the RDA of India throughout the ages. CONCLUSION Undernutrition in the form of underweight, stunting and wasting and low consumption of dietary intake (energy and protein) was found to be widely prevalent among Kamar tribal children. Therefore, an urgent dietary intervention programme is necessary. Further studies are required to investigate into problem and to supplement the key nutrients which are required to ensure a good nutritional status in children.
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Affiliation(s)
- Mitashree Mitra
- School of Studies in Anthropology, Pt. Ravishankar Shukla University, Raipur, Chattisgarh, India
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