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Xu W, Chen Y, Shi L, Wang L, Peng DL. Bi-magnetic Mn 3O 4@Ni core-shell binary superparticles: Self-assembly preparation and magnetic behaviors. J Colloid Interface Sci 2024; 673:517-526. [PMID: 38879993 DOI: 10.1016/j.jcis.2024.06.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 06/10/2024] [Accepted: 06/12/2024] [Indexed: 06/18/2024]
Abstract
Binary superparticles formed by self-assembling two different types of nanoparticles may utilize the synergistic interactions and create advanced multifunctional materials. Bi-magnetic superparticles with a core-shell structure have unique properties due to their specific spatial configurations. Herein, we built Mn3O4@Ni core-shell binary superparticles via an emulsion self-assembly technique. The superparticles are generated with a spherical morphology, and have a typical average size of about 240 nm. By altering the ratio of the two magnetic nanoparticles, the thickness of Ni shells can be adjusted. Oleic acid ligands are crucial for the formation of core-shell structure. Magnetic analysis suggests that core-shell superparticles display dual-phase magnetic interactions, contrasting with the single-phase magnetic behaviors of commonly core-shell magnetic nanoparticles. The calculation on the effective magnetic anisotropy constants indicates that the presence of Ni shell layers reduces the dipole interactions among the Mn3O4 core particles. Due to the presence of Ni nanoparticle shells, the blocking temperature of Mn3O4 is reduced, while the Curie temperature of Mn3O4 is independent on Ni content. Tunable magnetic properties can be achieved by modulating the Ni nanoparticle shell thickness. This study offers insights for the development of core-shell superparticles with varied magnetic characteristics.
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Affiliation(s)
- Wanjie Xu
- Department of Materials Science and Engineering, State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, College of Materials, Xiamen University, Xiamen, 361005, China
| | - Yuanzhi Chen
- Department of Materials Science and Engineering, State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, College of Materials, Xiamen University, Xiamen, 361005, China.
| | - Liubin Shi
- Department of Materials Science and Engineering, State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, College of Materials, Xiamen University, Xiamen, 361005, China
| | - Laisen Wang
- Department of Materials Science and Engineering, State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, College of Materials, Xiamen University, Xiamen, 361005, China
| | - Dong-Liang Peng
- Department of Materials Science and Engineering, State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, College of Materials, Xiamen University, Xiamen, 361005, China.
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2
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Xu W, Chen Y, Niederberger M, Tervoort E, Mei J, Peng DL. Self-Assembled Preparation of Porous Nickel Phosphide Superparticles with Tunable Phase and Porosity for Efficient Hydrogen Evolution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309435. [PMID: 38229146 DOI: 10.1002/smll.202309435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/19/2023] [Indexed: 01/18/2024]
Abstract
Self-assembly of colloidal nanoparticles enables the easy building of assembly units into higher-order structures and the bottom-up preparation of functional materials. Nickel phosphides represent an important group of catalysts for hydrogen evolution reaction (HER) from water splitting. In this paper, the preparation of porous nickel phosphide superparticles and their HER efficiencies are reported. Ni and Ni2P nanoparticles are self-assembled into binary superparticles via an oil-in-water emulsion method. After annealing and acid etching, the as-prepared Ni-Ni2P binary superparticles change into porous nickel phosphide superparticles. The porosity and crystalline phase of the superparticles can be tuned by adjusting the ratio of Ni and Ni2P nanoparticles. The resulting porous superparticles are effective in driving HER under acidic conditions, and the modulation of porosity and phase further optimize the electrochemical performance. The prepared Ni3P porous superparticles not only possess a significantly enhanced specific surface area compared to solid Ni-Ni2P superparticles but also exhibit an excellent HER efficiency. The calculations based on the density functional theories show that the (110) crystal facet exhibits a relatively lower Gibbs free energy of hydrogen adsorption. This work provides a self-assembly approach for the construction of porous metal phosphide nanomaterials with tunable crystalline phase and porosity.
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Affiliation(s)
- Wanjie Xu
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, China
| | - Yuanzhi Chen
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, China
| | - Markus Niederberger
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, Zürich, 8093, Switzerland
| | - Elena Tervoort
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, Zürich, 8093, Switzerland
| | - Jie Mei
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, China
| | - Dong-Liang Peng
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, China
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3
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Lelouche SNK, Lemir I, Biglione C, Craig T, Bals S, Horcajada P. AuNP/MIL-88B-NH 2 Nanocomposite for the Valorization of Nitroarene by Green Catalytic Hydrogenation. Chemistry 2024; 30:e202400442. [PMID: 38515307 DOI: 10.1002/chem.202400442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 03/23/2024]
Abstract
The efficiency of a catalytic process is assessed based on conversion, yield, and time effectiveness. However, these parameters are insufficient for evaluating environmentally sustainable research. As the world is urged to shift towards green catalysis, additional factors such as reaction media, raw material availability, sustainability, waste minimization and catalyst biosafety, need to be considered to accurately determine the efficacy and sustainability of the process. By combining the high porosity and versatility of metal organic frameworks (MOFs) and the activity of gold nanoparticles (AuNPs), efficient, cyclable and biosafe composite catalysts can be achieved. Thus, a composite based on AuNPs and the nanometric flexible porous iron(III) aminoterephthalate MIL-88B-NH2 was successfully synthesized and fully characterized. This nanocomposite was tested as catalyst in the reduction of nitroarenes, which were identified as anthropogenic water pollutants, reaching cyclable high conversion rates at short times for different nitroarenes. Both synthesis and catalytic reactions were performed using green conditions, and even further tested in a time-optimizing one-pot synthesis and catalysis experiment. The sustainability and environmental impact of the catalytic conditions were assessed by green metrics. Thus, this study provides an easily implementable synthesis, and efficient catalysis, while minimizing the environmental and health impact of the process.
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Affiliation(s)
- Sorraya N K Lelouche
- Advanced Porous Materials Unit (APMU), IMDEA Energy Institute, Av. Ramón de La Sagra, 3, 28935, Móstoles, Madrid, Spain
- EID, University Rey Juan Carlos (URJC), Tulipán s/n, Móstoles, 28933, Spain
| | - Ignacio Lemir
- Advanced Porous Materials Unit (APMU), IMDEA Energy Institute, Av. Ramón de La Sagra, 3, 28935, Móstoles, Madrid, Spain
| | - Catalina Biglione
- Advanced Porous Materials Unit (APMU), IMDEA Energy Institute, Av. Ramón de La Sagra, 3, 28935, Móstoles, Madrid, Spain
| | - Tim Craig
- EMAT and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
| | - Sara Bals
- EMAT and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
| | - Patricia Horcajada
- Advanced Porous Materials Unit (APMU), IMDEA Energy Institute, Av. Ramón de La Sagra, 3, 28935, Móstoles, Madrid, Spain
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4
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Gaudin LF, Funston AM, Bentley CL. Drop-cast gold nanoparticles are not always electrocatalytically active for the borohydride oxidation reaction. Chem Sci 2024; 15:7243-7258. [PMID: 38756820 PMCID: PMC11095372 DOI: 10.1039/d4sc00676c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 04/11/2024] [Indexed: 05/18/2024] Open
Abstract
The next-generation of energy devices rely on advanced catalytic materials, especially electrocatalytic nanoparticles (NPs), to achieve the performance and cost required to reshape the energy landscape towards a more sustainable and cleaner future. It has become imperative to maximize the performance of the catalyst, both through improvement of the intrinsic activity of the NP, and by ensuring all particles are performing at the level of their capability. This requires not just a structure-function understanding of the catalytic material, but also an understanding of how the catalyst performance is impacted by its environment (substrate, ligand, etc.). The intrinsic activity and environment of catalytic particles on a support may differ wildly by particle, thus it is essential to build this understanding from a single-entity perspective. To achieve this herein, scanning electrochemical cell microscopy (SECCM) has been used, which is a droplet-based scanning probe technique which can encapsulate single NPs, and apply a voltage to the nanoparticle whilst measuring its resulting current. Using SECCM, single AuNPs have been encapsulated, and their activity for the borohydride oxidation reaction (BOR) is measured. A total of 268 BOR-active locations were probed (178 single particles) and a series of statistical analyses were performed in order to make the following discoveries: (1) a certain percentage of AuNPs display no BOR activity in the SECCM experiment (67.4% of single NPs), (2) visibly-similar particles display wildly varied BOR activities which cannot be explained by particle size, (3) the impact of cluster size (#NP at a single location) on a selection of diagnostic electrochemical parameters can be easily probed with SECCM, (4) exploratory statistical correlation between these parameters can be meaningfully performed with SECCM, and (5) outlying "abnormal" NP responses can be probed on a particle-by-particle basis. Each one of these findings is its own worthwhile study, yet this has been achieved with a single SECCM scan. It is hoped that this research will spur electrochemists and materials scientists to delve deeper into their substantial datasets in order to enhance the structure-function understanding, to bring about the next generation of high-performance electrocatalysts.
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Affiliation(s)
- Lachlan F Gaudin
- School of Chemistry, Monash University Clayton 3800 VIC Australia
| | - Alison M Funston
- School of Chemistry, Monash University Clayton 3800 VIC Australia
- ARC Centre of Excellence in Exciton Science, Monash University Clayton 3800 VIC Australia
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5
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You SM, Choi JH, Ryu SY, Byeon JW, Kim H, Cha HG. Investigation of lignin substructures participating in self-assembly for the synthesis of monodisperse lignin spherical particles. Int J Biol Macromol 2024; 259:129214. [PMID: 38185300 DOI: 10.1016/j.ijbiomac.2024.129214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/01/2024] [Accepted: 01/02/2024] [Indexed: 01/09/2024]
Abstract
The intricate structure of lignin, characterized by a mix of hydrophilic components and hydrophobic structures from its aliphatic and aromatic constituents, poses challenges in creating monodisperse particles. This is due to the need for precise modulation of self-assembly kinetics. Herein, we explore a correlation between the substructure of lignin and its capacity for self-assembly. We have conducted an in-depth investigation into the interactions between hydrophilic groups, such as phenolic and aromatic-OH, and monolignols with interunit linkages that are involved in the formation of lignin particles (LPs). A high degree of hydrophilicity with a condensed structure is crucial for high supersaturation levels, which in turn determines the growth phase and leads to small LPs. An approach based on tailoring the supersaturation level which is contingent on the structural characteristics of extracted organosolv lignin was used to obtain remarkably uniform LPs with mean diameters of approximately 230 and 480 nm. The results of this study have the potential to serve as a foundation for the preparation of monodisperse LPs derived from various lignin sources as well as for the development of methods to extract lignin containing a specific chemical substructure.
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Affiliation(s)
- Sang-Mook You
- Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - June-Ho Choi
- Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - So Yeon Ryu
- Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Je Wook Byeon
- Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Hoyong Kim
- Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea.
| | - Hyun Gil Cha
- Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea.
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6
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Xu W, Lin Z, Pan S, Chen J, Wang T, Cortez‐Jugo C, Caruso F. Direct Assembly of Metal-Phenolic Network Nanoparticles for Biomedical Applications. Angew Chem Int Ed Engl 2023; 62:e202312925. [PMID: 37800651 PMCID: PMC10953434 DOI: 10.1002/anie.202312925] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Indexed: 10/07/2023]
Abstract
Coordination assembly offers a versatile means to developing advanced materials for various applications. However, current strategies for assembling metal-organic networks into nanoparticles (NPs) often face challenges such as the use of toxic organic solvents, cytotoxicity because of synthetic organic ligands, and complex synthesis procedures. Herein, we directly assemble metal-organic networks into NPs using metal ions and polyphenols (i.e., metal-phenolic networks (MPNs)) in aqueous solutions without templating or seeding agents. We demonstrate the role of buffers (e.g., phosphate buffer) in governing NP formation and the engineering of the NP physicochemical properties (e.g., tunable sizes from 50 to 270 nm) by altering the assembly conditions. A library of MPN NPs is prepared using natural polyphenols and various metal ions. Diverse functional cargos, including anticancer drugs and proteins with different molecular weights and isoelectric points, are readily loaded within the NPs for various applications (e.g., biocatalysis, therapeutic delivery) by direct mixing, without surface modification, owing to the strong affinity of polyphenols to various guest molecules. This study provides insights into the assembly mechanism of metal-organic complexes into NPs and offers a simple strategy to engineer nanosized materials with desired properties for diverse biotechnological applications.
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Affiliation(s)
- Wanjun Xu
- Department of Chemical EngineeringThe University of MelbourneParkvilleVictoria3010Australia
| | - Zhixing Lin
- Department of Chemical EngineeringThe University of MelbourneParkvilleVictoria3010Australia
| | - Shuaijun Pan
- Department of Chemical EngineeringThe University of MelbourneParkvilleVictoria3010Australia
- State Key Laboratory of Chemo/Biosensing and Chemometricsand College of Chemistry and Chemical EngineeringHunan UniversityChangsha410082China
| | - Jingqu Chen
- Department of Chemical EngineeringThe University of MelbourneParkvilleVictoria3010Australia
| | - Tianzheng Wang
- Department of Chemical EngineeringThe University of MelbourneParkvilleVictoria3010Australia
| | - Christina Cortez‐Jugo
- Department of Chemical EngineeringThe University of MelbourneParkvilleVictoria3010Australia
| | - Frank Caruso
- Department of Chemical EngineeringThe University of MelbourneParkvilleVictoria3010Australia
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7
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Nilsson S, El Berch JN, Albinsson D, Fritzsche J, Mpourmpakis G, Langhammer C. The Role of Grain Boundary Sites for the Oxidation of Copper Catalysts during the CO Oxidation Reaction. ACS NANO 2023; 17:20284-20298. [PMID: 37796938 PMCID: PMC10604102 DOI: 10.1021/acsnano.3c06282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 09/28/2023] [Indexed: 10/07/2023]
Abstract
The oxidation of transition metal surfaces is a process that takes place readily at ambient conditions and that, depending on the specific catalytic reaction at hand, can either boost or hamper activity and selectivity. Cu catalysts are no exception in this respect since they exhibit different oxidation states for which contradicting activities have been reported, as, for example, in the catalytic oxidation of CO. Here, we investigate the impact of low-coordination sites on nanofabricated Cu nanoparticles with engineered grain boundaries on the oxidation of the Cu surface under CO oxidation reaction conditions. Combining multiplexed in situ single particle plasmonic nanoimaging, ex situ transmission electron microscopy imaging, and density functional theory calculations reveals a distinct dependence of particle oxidation rate on grain boundary density. Additionally, we found that the oxide predominantly nucleates at grain boundary-surface intersections, which leads to nonuniform oxide growth that suppresses Kirkendall-void formation. The oxide nucleation rate on Cu metal catalysts was revealed to be an interplay of surface coordination and CO oxidation behavior, with low coordination favoring Cu oxidation and high coordination favoring CO oxidation. These findings explain the observed single particle-specific onset of Cu oxidation as being the consequence of the individual particle grain structure and provide an explanation for widely distributed activity states of particles in catalyst bed ensembles.
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Affiliation(s)
- Sara Nilsson
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - John N. El Berch
- Department
of Chemical and Petroleum Engineering, University
of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - David Albinsson
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Joachim Fritzsche
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Giannis Mpourmpakis
- Department
of Chemical and Petroleum Engineering, University
of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Christoph Langhammer
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
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8
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Bera S, Sahu P, Dutta A, Nobile C, Pradhan N, Cozzoli PD. Partial Chemicalization of Nanoscale Metals: An Intra-Material Transformative Approach for the Synthesis of Functional Colloidal Metal-Semiconductor Nanoheterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2305985. [PMID: 37724799 DOI: 10.1002/adma.202305985] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/09/2023] [Indexed: 09/21/2023]
Abstract
Heterostructuring colloidal nanocrystals into multicomponent modular constructs, where domains of distinct metal and semiconductor phases are interconnected through bonding interfaces, is a consolidated approach to advanced breeds of solution-processable hybrid nanomaterials capable of expressing richly tunable and even entirely novel physical-chemical properties and functionalities. To meet the challenges posed by the wet-chemical synthesis of metal-semiconductor nanoheterostructures and to overcome some intrinsic limitations of available protocols, innovative transformative routes, based on the paradigm of partial chemicalization, have recently been devised within the framework of the standard seeded-growth scheme. These techniques involve regiospecific replacement reactions on preformed nanocrystal substrates, thus holding great synthetic potential for programmable configurational diversification. This review article illustrates achievements so far made in the elaboration of metal-semiconductor nanoheterostructures with tailored arrangements of their component modules by means of conversion pathways that leverage on spatially controlled partial chemicalization of mono- and bi-metallic seeds. The advantages and limitations of these approaches are discussed within the context of the most plausible mechanisms underlying the evolution of the nanoheterostructures in liquid media. Representative physical-chemical properties and applications of chemicalization-derived metal-semiconductor nanoheterostructures are emphasized. Finally, prospects for developments in the field are outlined.
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Affiliation(s)
- Suman Bera
- School of Materials Sciences, Indian Association for the Cultivation of Sciences (IACS), Kolkata, 700032, India
| | - Puspanjali Sahu
- School of Materials Sciences, Indian Association for the Cultivation of Sciences (IACS), Kolkata, 700032, India
| | - Anirban Dutta
- School of Materials Sciences, Indian Association for the Cultivation of Sciences (IACS), Kolkata, 700032, India
| | - Concetta Nobile
- CNR NANOTEC - Institute of Nanotechnology, UOS di Lecce, Lecce, 73100, Italy
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Sciences (IACS), Kolkata, 700032, India
| | - P Davide Cozzoli
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Lecce, 73100, Italy
- UdR INSTM di Lecce, c/o Università del Salento, Lecce, 73100, Italy
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9
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Oliyapour Y, Dabiri S, Molavi O, Hejazi MS, Davaran S, Jafari S, Montazersaheb S. Chrysin and chrysin-loaded nanocarriers induced immunogenic cell death on B16 melanoma cells. Med Oncol 2023; 40:278. [PMID: 37624439 DOI: 10.1007/s12032-023-02145-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 07/29/2023] [Indexed: 08/26/2023]
Abstract
Induction of immunogenic cell death (ICD) is a promising strategy for cancer immunotherapy. Chrysin, which has potential anticancer effects, faces limitations in clinical applications due to its poor water solubility. This study aimed to formulate chrysin with PEG-poly(α-benzylcarboxylate-ε-caprolactone) (PBCL) nanoparticles (NPs) and assess their anticancer and ICD-inducing potency in melanoma cells, comparing with free chrysin. The co-solvent evaporation method was employed to develop chrysin-loaded NPs. UV spectroscopy, dynamic light scattering, and the dialysis bag method were used to evaluate the encapsulation efficiency (EE), particle size, polydispersity index (PDI), and drug release profile, respectively. The anticancer effects of the drugs were assessed using the MTT and trypan blue exclusion assays. Flow cytometry was employed to evaluate apoptosis and calreticulin (CRT) expression. ELISA and western blotting were used to detect heat shock protein 90 (HSP90), Annexin A1, GRP78 (Glucose-related protein78), and activated protein kinase R-like endoplasmic reticulum kinase (p-PERK). Chrysin-loaded PEG-PBCL NPs (chrysin-PEG-PBCL) showed an EE of 97 ± 1%. Chrysin-PEG-PBCL was 38.18 ± 3.96 nm in size, with a PDI being 0.62 ± 0.23. Chrysin-PEG-PBCL showed an initial burst release, followed by sustained release over 24 h. Chrysin-PEG-PBCL exhibited a significantly stronger anticancer effect in B16 cells. Chrysin-PEG-PBCL was found to be more potent in inducing apoptosis. Both free chrysin and chrysin NPs induced ICD as indicated by an increase in the levels of ICD biomarkers. Interestingly, chrysin NPs were found to be more potent inducers of ICD than the free drug. These findings demonstrate that chrysin and chrysin-PEG-PBCL NPs can induce ICD in B16 cells. PEG-PBCL NPs significantly enhanced the potency of chrysin in inducing ICD compared to its free form.
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Affiliation(s)
- Yasaman Oliyapour
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sheida Dabiri
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ommoleila Molavi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Biotechnology Research Center, Tabriz University of Medical Science, Tabriz, Iran
| | - Mohammad Saeid Hejazi
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, 5166614731, Iran
| | - Soodabeh Davaran
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sevda Jafari
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, 5166614711, Iran.
| | - Soheila Montazersaheb
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, 5166614731, Iran.
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10
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Frickenstein AN, Mukherjee S, Harcourt T, He Y, Sheth V, Wang L, Malik Z, Wilhelm S. Quantification of monodisperse and biocompatible gold nanoparticles by single-particle ICP-MS. Anal Bioanal Chem 2023; 415:4353-4366. [PMID: 36670192 PMCID: PMC10645370 DOI: 10.1007/s00216-023-04540-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/03/2023] [Accepted: 01/11/2023] [Indexed: 01/21/2023]
Abstract
Bioanalytical and biomedical applications often require nanoparticles that exhibit narrow size distributions and biocompatibility. Here, we demonstrate how different synthesis methods affect gold nanoparticle (AuNPs) monodispersity and cytotoxicity. Using single particle inductively coupled plasma mass spectrometry (SP-ICP-MS), we found that the size distribution of AuNPs synthesized with a cetyltrimethylammonium chloride (CTAC) cap was significantly improved compared to AuNPs synthesized with citrate capping agents. We determined an up to 4× decrease in the full width at half maximum (FWHM) value of the normal distributions of AuNP diameter and up to a 12% decrease in relative standard deviation (RSD). While the CTAC-capped AuNPs exhibit narrow nanoparticle size distributions, they are cytotoxic, which limits safe and effective bioanalytical and biomedical applications. We sought to impart biocompatibility to CTAC-capped AuNPs through a PEGylation-based surface ligand exchange. We developed a unique ligand exchange method driven by physical force. We demonstrated the successful PEGylation using various PEG derivatives and used these PEGylated nanoparticles to further bioconjugate nucleic acids and peptides. Using cell viability quantification, we confirmed that the monodisperse PEGylated AuNPs were biocompatible. Our monodisperse and biocompatible nanoparticles may advance safe and effective bioanalytical and biomedical applications of nanomaterials.
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Affiliation(s)
- Alex N Frickenstein
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, 73019, USA
| | - Shirsha Mukherjee
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, 73019, USA
| | - Tekena Harcourt
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, 73019, USA
| | - Yuxin He
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, 73019, USA
| | - Vinit Sheth
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, 73019, USA
| | - Lin Wang
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, 73019, USA
| | - Zain Malik
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, 73019, USA
| | - Stefan Wilhelm
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, 73019, USA.
- Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA.
- Institute for Biomedical Engineering, Science, and Technology (IBEST), University of Oklahoma, Norman, OK, 73019, USA.
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11
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Long Y, Xia Y, Zhu R, Xia S, Cao Y, Li T, Dong A. An elegant 3D-ordered hierarchically porous framework to anchor Pt nanocrystals for durable oxygen reduction reaction. J Colloid Interface Sci 2023; 646:794-801. [PMID: 37229997 DOI: 10.1016/j.jcis.2023.05.106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/27/2023] [Accepted: 05/17/2023] [Indexed: 05/27/2023]
Abstract
While Platinum (Pt)-based electrocatalysts have been extensively studied for the oxygen reduction reaction (ORR), improving their durability remains a challenge. One promising approach is to design structure-defined carbon supports that can uniformly immobilize Pt nanocrystals (NCs). In this study, we present an innovative strategy for constructing three-dimensional ordered, hierarchically porous carbon polyhedrons (3D-OHPCs) as an efficient support for immobilizing Pt NCs. We achieved this by template-confined pyrolysis of a zinc-based zeolite imidazolate framework (ZIF-8) grown within the voids of polystyrene templates, followed by carbonizing the native oleylamine ligands on Pt NCs to produce graphitic carbon shells. This hierarchical structure enables the uniform anchorage of Pt NCs, while enhancing facile mass transfer and local accessibility of active sites. The optimal material with graphitic carbon armor shells on the surface of Pt NCs (CA-Pt), named CA-Pt@3D-OHPCs-1600, shows comparable activities to commercial Pt/C catalysts. Furthermore, it can withstand over 30,000 cycles of accelerated durability tests, owing to the protective carbon shells and hierarchically ordered porous carbon supports. Our study presents a promising approach for designing highly efficient and durable electrocatalysts for energy-based applications and beyond.
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Affiliation(s)
- Ying Long
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Yan Xia
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Run Zhu
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Shenxin Xia
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Yangfei Cao
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200438, China.
| | - Tongtao Li
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200438, China.
| | - Angang Dong
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200438, China.
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12
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Guan H, Harris C, Sun S. Metal-Ligand Interactions and Their Roles in Controlling Nanoparticle Formation and Functions. Acc Chem Res 2023. [PMID: 37205747 DOI: 10.1021/acs.accounts.3c00156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
ConspectusFunctional nanoparticles (NPs) have been studied extensively in the past decades for their unique nanoscale properties and their promising applications in advanced nanosciences and nanotechnologies. One critical component of studying these NPs is to prepare monodisperse NPs so that their physical and chemical properties can be tuned and optimized. Solution phase reactions have provided the most reliable processes for fabricating such monodisperse NPs in which metal-ligand interactions play essential roles in the synthetic controls. These interactions are also key to stabilizing the preformed NPs for them to show the desired electronic, magnetic, photonic, and catalytic properties. In this Account, we summarize some representative organic bipolar ligands that have recently been explored to control NP formation and NP functions. These include aliphatic acids, alkylphosphonic acids, alkylamines, alkylphosphines, and alkylthiols. This ligand group covers metal-ligand interactions via covalent, coordination, and electrostatic bonds that are most commonly employed to control NP sizes, compositions, shapes, and properties. The metal-ligand bonding effects on NP nucleation rate and growth can now be more thoroughly investigated by in situ spectroscopic and theoretical studies. In general, to obtain the desired NP size and monodispersity requires rational control of the metal/ligand ratios, concentrations, and reaction temperatures in the synthetic solutions. In addition, for multicomponent NPs, the binding strength of ligands to various metal surfaces needs to be considered in order to prepare these NPs with predesigned compositions. The selective ligand binding onto certain facets of NPs is also key to anisotropic growth of NPs, as demonstrated in the synthesis of one-dimensional nanorods and nanowires. The effects of metal-ligand interactions on NP functions are discussed in two aspects, electrochemical catalysis for CO2 reduction and electronic transport across NP assemblies. We first highlight recent advances in using surface ligands to promote the electrochemical reduction of CO2. Several mechanisms are discussed, including the modification of the catalyst surface environment, electron transfer through the metal-organic interface, and stabilization of the CO2 reduction intermediates, all of which facilitate selective CO2 reduction. These strategies lead to better understanding of molecular level control of catalysis for further catalyst optimization. Metal-ligand interaction in magnetic NPs can also be used to control tunneling magnetoresistance properties across NPs in NP assemblies by tuning NP interparticle spacing and surface spin polarization. In all, metal-ligand interactions have yielded particularly promising directions for tuning CO2 reduction selectivity and for optimizing nanoelectronics, and the concepts can certainly be extended to rationalize NP engineering at atomic/molecular precision for the fabrication of sensitive functional devices that will be critical for many nanotechnological applications.
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Affiliation(s)
- Huanqin Guan
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Cooro Harris
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Shouheng Sun
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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13
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Hydrogen Generation from Bamboo Biomass using Enzymatic Hydrolysis and Subsequent Microbial Electrolysis in a Single Chamber Microbial Electrolysis Cell. Biochem Eng J 2023. [DOI: 10.1016/j.bej.2023.108853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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14
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Rosato R, Napoli E, Granata G, Di Vito M, Garzoli S, Geraci C, Rizzo S, Torelli R, Sanguinetti M, Bugli F. Study of the Chemical Profile and Anti-Fungal Activity against Candida auris of Cinnamomum cassia Essential Oil and of Its Nano-Formulations Based on Polycaprolactone. PLANTS (BASEL, SWITZERLAND) 2023; 12:358. [PMID: 36679069 PMCID: PMC9860731 DOI: 10.3390/plants12020358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Candida auris represents an emerging pathogen that results in nosocomial infections and is considered a serious global health problem. The aim of this work was to evaluate the in vitro antifungal efficacy of Cinnamomum cassia essential oil (CC-EO) pure or formulated in polycaprolactone (PCL) nanoparticles against ten clinical strains of C. auris. METHODS nanoparticles of PCL were produced using CC-EO (nano-CC-EO) and cinnamaldehyde (CIN) through the nanoprecipitation method. The chemical profile of both CC-EO and nano-CC-EO was evaluated using SPME sampling followed by GC-MS analysis. Micro-broth dilution tests were performed to evaluate both fungistatic and fungicidal effectiveness of CC-EO and CIN, pure and nano-formulated. Furthermore, checkerboard tests to evaluate the synergistic action of CC-EO or nano-CC-EO with micafungin or fluconazole were conducted. Finally, the biofilm disrupting activity of both formulations was evaluated. RESULTS GC-MS analysis shows a different composition between CC-EO and nano-CC-EO. Moreover, the microbiological analyses do not show any variation in antifungal effectiveness either towards the planktonic form (MICCC-EO = 0.01 ± 0.01 and MICnano-CC-EO = 0.02 ± 0.01) or the biofilm form. No synergistic activity with the antifungal drugs tested was found. CONCLUSIONS both CC-EO and nano-CC-EO show the same antimicrobial effectiveness and are potential assets in the fight against C. auris.
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Affiliation(s)
- Roberto Rosato
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00167 Rome, Italy
| | - Edoardo Napoli
- Istituto di Chimica Biomolecolare—Consiglio Nazionale delle Ricerche, 95126 Catania, Italy
| | - Giuseppe Granata
- Istituto di Chimica Biomolecolare—Consiglio Nazionale delle Ricerche, 95126 Catania, Italy
| | - Maura Di Vito
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00167 Rome, Italy
| | - Stefania Garzoli
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma Sapienza, Piazzale Aldo Moro 5, 00100 Rome, Italy
| | - Corrada Geraci
- Istituto di Chimica Biomolecolare—Consiglio Nazionale delle Ricerche, 95126 Catania, Italy
| | - Silvia Rizzo
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00167 Rome, Italy
| | - Riccardo Torelli
- Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Maurizio Sanguinetti
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00167 Rome, Italy
- Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Francesca Bugli
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00167 Rome, Italy
- Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
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15
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Mičky S, Bodík M, Mičetić M, Fetzer F, Strienz M, Held V, Jergel M, Schnepf A, Schreiber F, Šiffalovič P. Multilayer Langmuir Film of Monodisperse Au Nanoclusters: Unusual Growth via Bilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14850-14856. [PMID: 36440917 DOI: 10.1021/acs.langmuir.2c02514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The assembly of nanomaterials into thin films is an important area in the nanofabrication of novel devices. The monodispersity of nanoparticles plays an essential role in the resulting quality of the assembled mono- and multilayers. Larger polydispersity leads to smaller lateral correlation lengths and smaller domains of aligned nanoparticles, thus resulting in more point and line defects. Perfectly monodisperse nanoparticles should therefore minimize the number of defects in the assembled films. Despite tremendous progress in reducing the polydispersity of nanoparticles, there has been limited research on the assembly of thin films out of perfectly monodisperse nanoclusters. Here, we show a formation of Langmuir films using perfectly monodisperse gold nanoclusters with composition Au32(nBu3P)12Cl8 exhibiting a diameter of 1.8 nm. Using both in situ and ex situ small-angle X-ray scattering, we show that the monolayer formed on a Langmuir-Blodgett trough exhibits long-range order. Moreover, after compressing the monolayer, we found that the stress accumulated prior to the monolayer collapse triggers a transition to a short-range order not previously reported. If such monolayer is compressed further, the second layer is not formed as in the case of standard nanoparticles. Instead, a growth of islands by an odd number of layers is observed, leading to a thin film with a structure consisting of two different orientations of the hexagonal lattice. Such anomalous behavior may have implications for the possibilities of thin-film formation.
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Affiliation(s)
- Simon Mičky
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
| | - Michal Bodík
- Nanotechnology Group, ETH Zürich, Säumerstrasse 4, 8803Rüschlikon, Switzerland
| | | | - Florian Fetzer
- Chemistry Department, University Tübingen, Auf der Morgenstelle 18, D-72076Tübingen, Germany
| | - Markus Strienz
- Chemistry Department, University Tübingen, Auf der Morgenstelle 18, D-72076Tübingen, Germany
| | - Vladimír Held
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
| | - Matej Jergel
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
- Center for Advanced Materials Application, Dúbravská cesta 9, 845 11Bratislava, Slovakia
| | - Andreas Schnepf
- Chemistry Department, University Tübingen, Auf der Morgenstelle 18, D-72076Tübingen, Germany
| | - Frank Schreiber
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076Tübingen, Germany
| | - Peter Šiffalovič
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
- Center for Advanced Materials Application, Dúbravská cesta 9, 845 11Bratislava, Slovakia
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16
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Li S, Nagarajan AV, Du X, Li Y, Liu Z, Kauffman DR, Mpourmpakis G, Jin R. Dissecting Critical Factors for Electrochemical CO
2
Reduction on Atomically Precise Au Nanoclusters. Angew Chem Int Ed Engl 2022; 61:e202211771. [DOI: 10.1002/anie.202211771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Indexed: 11/16/2022]
Affiliation(s)
- Site Li
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
- National Energy Technology Laboratory (NETL) United States Department of Energy Pittsburgh, PA USA
| | | | - Xiangsha Du
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
| | - Yingwei Li
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
| | - Zhongyu Liu
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
| | - Douglas R. Kauffman
- National Energy Technology Laboratory (NETL) United States Department of Energy Pittsburgh, PA USA
| | - Giannis Mpourmpakis
- Department of Chemical Engineering University of Pittsburgh Pittsburgh PA 15261 USA
| | - Rongchao Jin
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
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17
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Barasinski M, Garnweitner G. Aufreinigung von Nano‐ und Submikronpartikeln durch präparative Gelelektrophorese. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202200134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Matthäus Barasinski
- Technische Universität Braunschweig Institut für Partikeltechnik und Laboratory for Emerging Nanometrology 38104 Braunschweig Deutschland
| | - Georg Garnweitner
- Technische Universität Braunschweig Institut für Partikeltechnik und Laboratory for Emerging Nanometrology 38104 Braunschweig Deutschland
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18
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Li S, Nagarajan AV, Du X, Li Y, Liu Z, Kauffman DR, Mpourmpakis G, Jin R. Dissecting Critical Factors for Electrochemical CO
2
Reduction on Atomically Precise Au Nanoclusters. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Site Li
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
- National Energy Technology Laboratory (NETL) United States Department of Energy Pittsburgh, PA USA
| | | | - Xiangsha Du
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
| | - Yingwei Li
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
| | - Zhongyu Liu
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
| | - Douglas R. Kauffman
- National Energy Technology Laboratory (NETL) United States Department of Energy Pittsburgh, PA USA
| | - Giannis Mpourmpakis
- Department of Chemical Engineering University of Pittsburgh Pittsburgh PA 15261 USA
| | - Rongchao Jin
- Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
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19
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Liu M, Liu K, Gao C. Effects of Ligands on Synthesis and Surface‐Engineering of Noble Metal Nanocrystals for Electrocatalysis. ChemElectroChem 2022. [DOI: 10.1002/celc.202200651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Moxuan Liu
- Xi'an Jiaotong University Frontier Institute of Science and Technology 99 Yanxiang Road 710054 Xi'an CHINA
| | - Kai Liu
- Xi'an Jiaotong University Frontier Institute of Science and Technology 99 Yanxiang Road 710054 Xi'an CHINA
| | - Chuanbo Gao
- Xi'an Jiaotong University Frontier Institute of Science and Technology 99 Yanxiang Road 710054 Xi'an CHINA
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20
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Li Z, Zou J, Xi X, Fan P, Zhang Y, Peng Y, Banham D, Yang D, Dong A. Native Ligand Carbonization Renders Common Platinum Nanoparticles Highly Durable for Electrocatalytic Oxygen Reduction: Annealing Temperature Matters. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2202743. [PMID: 35426176 DOI: 10.1002/adma.202202743] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/09/2022] [Indexed: 06/14/2023]
Abstract
Current protocols for synthesizing monodisperse platinum (Pt) nanoparticles typically involve the use of hydrocarbon molecules as surface-capping ligands. Using Pt nanoparticles as catalysts for the oxygen reduction reaction (ORR), however, these ligands must be removed to expose surface sites. Here, highly durable ORR catalysts are realized without ligand removal; instead, the native ligands are converted into ultrathin, conformal graphitic shells by simple thermal annealing. Strikingly, the annealing temperature is a critical factor dictating the ORR performance of Pt catalysts. Pt nanoparticles treated at 500 °C show a very poor ORR activity, whereas those annealed at 700 °C become highly active along with exceptional stability. In-depth characterization reveals that thermal treatment from 500 to 700 °C gradually opens up the porosity in carbon shells through graphitization. Importantly, such graphitic-shell-coated Pt catalysts exhibit a superior ORR stability, largely retaining the activity after 20 000 cycles in a membrane electrode assembly. Moreover, this ligand carbonization strategy can be extended to modify commercial Pt/C catalysts with substantially enhanced stability. This work demonstrates the feasibility of boosting the ORR performance of common Pt nanoparticles by harnessing the native surface ligands, offering a robust approach of designing highly durable catalysts for proton-exchange-membrane fuel cells.
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Affiliation(s)
- Zhicheng Li
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
| | - Jinxiang Zou
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, China
| | - Xiangyun Xi
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
| | - Pengshuo Fan
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
| | - Yi Zhang
- School of Materials Science and Energy Engineering, Foshan University, Foshan, 528000, China
| | - Ye Peng
- School of Materials Science and Energy Engineering, Foshan University, Foshan, 528000, China
- Guangdong TaiJi Power, Foshan, 528000, China
| | - Dustin Banham
- School of Materials Science and Energy Engineering, Foshan University, Foshan, 528000, China
- Guangdong TaiJi Power, Foshan, 528000, China
| | - Dong Yang
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
| | - Angang Dong
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, China
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21
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Nilsson S, Nielsen MR, Fritzsche J, Langhammer C, Kadkhodazadeh S. Competing oxidation mechanisms in Cu nanoparticles and their plasmonic signatures. NANOSCALE 2022; 14:8332-8341. [PMID: 35616189 DOI: 10.1039/d2nr01054b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Chemical reactions involving nanoparticles often follow complex processes. In this respect, real-time probing of single nanoparticles under reactive conditions is crucial for uncovering the mechanisms driving the reaction pathway. Here, we have captured in situ the oxidation of single Cu nanoparticles to unravel a sequential competitive activation of different mechanisms at temperatures 50-200 °C. Using environmental scanning transmission electron microscopy, we monitor the evolution of oxide formation with sub-nanometre spatial resolution, and show how the prevalence of oxide island nucleation, Cabrera-Mott, Valensi-Carter and Kirkendall mechanisms under different conditions determines the morphology of the particles. Moreover, using in situ electron energy-loss spectroscopy, we probe the localised surface plasmons of individual particles during oxidation, and with the aid of finite-difference time-domain electrodynamic simulations investigate the signature of each mechanism in their plasmonic response. Our results shed light on the rich and intricate processes involved in the oxidation of nanoparticles, and provide in-depth insight into how these processes govern their morphology and optical response, beneficial for applications in catalysis, sensing, nanomedicine and plasmonics.
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Affiliation(s)
- Sara Nilsson
- Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden.
| | - Monia R Nielsen
- DTU Nanolab, Technical University of Denmark, Fysikvej, 2800 Kgs Lyngby, Denmark.
| | - Joachim Fritzsche
- Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden.
| | - Christoph Langhammer
- Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden.
| | - Shima Kadkhodazadeh
- DTU Nanolab, Technical University of Denmark, Fysikvej, 2800 Kgs Lyngby, Denmark.
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22
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Chakraborty N, Gandhi S, Verma R, Roy I. Emerging Prospects of Nanozymes for Antibacterial and Anticancer Applications. Biomedicines 2022; 10:biomedicines10061378. [PMID: 35740402 PMCID: PMC9219663 DOI: 10.3390/biomedicines10061378] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/25/2022] [Accepted: 06/06/2022] [Indexed: 12/17/2022] Open
Abstract
The ability of some nanoparticles to mimic the activity of certain enzymes paves the way for several attractive biomedical applications which bolster the already impressive arsenal of nanomaterials to combat deadly diseases. A key feature of such 'nanozymes' is the duplication of activities of enzymes or classes of enzymes, such as catalase, superoxide dismutase, oxidase, and peroxidase which are known to modulate the oxidative balance of treated cells for facilitating a particular biological process such as cellular apoptosis. Several nanoparticles that include those of metals, metal oxides/sulfides, metal-organic frameworks, carbon-based materials, etc., have shown the ability to behave as one or more of such enzymes. As compared to natural enzymes, these artificial nanozymes are safer, less expensive, and more stable. Moreover, their catalytic activity can be tuned by changing their size, shape, surface properties, etc. In addition, they can also be engineered to demonstrate additional features, such as photoactivated hyperthermia, or be loaded with active agents for multimodal action. Several researchers have explored the nanozyme-mediated oxidative modulation for therapeutic purposes, often in combination with other diagnostic and/or therapeutic modalities, using a single probe. It has been observed that such synergistic action can effectively by-pass the various defense mechanisms adapted by rogue cells such as hypoxia, evasion of immuno-recognition, drug-rejection, etc. The emerging prospects of using several such nanoparticle platforms for the treatment of bacterial infections/diseases and cancer, along with various related challenges and opportunities, are discussed in this review.
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Affiliation(s)
- Nayanika Chakraborty
- Department of Chemistry, University of Delhi, Delhi 110007, India; (N.C.); (S.G.)
| | - Sona Gandhi
- Department of Chemistry, University of Delhi, Delhi 110007, India; (N.C.); (S.G.)
- Department of Chemistry, Galgotias University, Greater Noida 203201, India
| | - Rajni Verma
- School of Physics, Faculty of Science, The University of Melbourne, Parkville, VIC 3010, Australia
- Correspondence: (R.V.); (I.R.)
| | - Indrajit Roy
- Department of Chemistry, University of Delhi, Delhi 110007, India; (N.C.); (S.G.)
- Correspondence: (R.V.); (I.R.)
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23
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Rudman KK, Hosseini S, Chatterjee K, Johnson B, Skrabalak SE. Sonoelectrosynthesis of monodisperse metal nanoparticles. NANOSCALE 2022; 14:6471-6479. [PMID: 35416234 DOI: 10.1039/d2nr00167e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Traditional colloidal syntheses of metal nanoparticles (NPs) are highly sensitive to the selection of and quality of chemical reducing agents and metal precursors. To address these challenges, we demonstrate the complete sonoelectrochemical synthesis of monodisperse metal NPs starting from bulk metal, using Cu as a model system. Electrochemical syntheses of NPs are of great interest as the oxidation and reduction processes that account for product formation can occur directly at the anode and cathode, respectively. This ability has the potential to improve reproducibility by simplifying the chemical pathway to NPs, with electrosyntheses often also providing unique kinetic pathways toward green product formation. Herein, ultrasound is coupled with electrosynthesis to clean the electrode surface, dispersing the NPs produced at the electrode into solution. We were able to shift the size distribution to form monodispersed metal NPs through control of applied potential (Vapplied) and ultrasonic pulses. The synthesis begins with electrooxidation of bulk Cu metal to directly dissolve metal ions into a microemulsion system. This step is followed by sonoelectroreduction of the ions, which facilitates the formation of dispersible, monodisperse Cu NPs with diameters <10 nm. The size distribution can be controlled by adjusting the Vapplied, pulse intensity, and pulse sequence implemented during sonoelectroreduction. We view this technique as a scalable method to synthesize metal NPs from bulk metal without chemical reducing agents.
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Affiliation(s)
- Kelly K Rudman
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
| | - Seyyedamirhossein Hosseini
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112, USA
| | - Kaustav Chatterjee
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
| | - Benjamin Johnson
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Sara E Skrabalak
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
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24
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Wang J, Chen W, Yang D, Fang Z, Liu W, Xiang T, Qiu X. Monodispersed Lignin Colloidal Spheres with Tailorable Sizes for Bio-Photonic Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2200671. [PMID: 35388977 DOI: 10.1002/smll.202200671] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/20/2022] [Indexed: 06/14/2023]
Abstract
Lignin colloidal spheres (LCSs) are promising biomaterials for application in drug storage and delivery, pollutant adsorption, and ultraviolet protection due to their biocompatibility, amphiphilicity, and conjugated structure. However, wide size distribution of LCSs greatly limits their performances, especially in many precise and advanced applications. Herein, the fabrication of monodispersed LCSs with tailorable sizes ranging from the nanoscale to microscale is reported. Lignin raw materials are first fractionated by solvent extraction, and then the lignin fraction is used to fabricate monodispersed LCSs by solvent/antisolvent self-assembly. The underlying mechanism for the formation of monodispersed LCS is primarily ascribed to the improved homogeneity of long-range intermolecular forces, especially the electrostatic forces and hydrophobic forces, between lignin molecules. Moreover, by manipulating the short-range order of LCSs, an innovative application of lignin as bio-photonic materials with tunable structural colorations (e.g., red, green, or blue) is demonstrated. This work not only provides deep insight and an effective strategy to eliminate the serious inhomogeneity of LCSs, but also makes lignin resources have great potential as biodegradable and biocompatible photonic materials in diverse advanced optical application fields such as photonic devices, anti-counterfeiting labels, and structural color pigments.
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Affiliation(s)
- Jingyu Wang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Wenhao Chen
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Dongjie Yang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Zhiqiang Fang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Weifeng Liu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Ting Xiang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Xueqing Qiu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
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25
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Guan H, Shen M, Harris C, Lin H, Wei K, Morales M, Bronowich N, Sun S. Cu 2O nanoparticle-catalyzed tandem reactions for the synthesis of robust polybenzoxazole. NANOSCALE 2022; 14:6162-6170. [PMID: 35388863 DOI: 10.1039/d2nr00492e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We report the synthesis of Cu2O nanoparticles (NPs) by controlled oxidation of Cu NPs and the study of these NPs as a robust catalyst for ammonia borane dehydrogenation, nitroarene hydrogenation, and amine/aldehyde condensation into Schiff-base compounds. Upon investigation of the size-dependent catalysis for ammonia borane dehydrogenation and nitroarene hydrogenation using 8-18 nm Cu2O NPs, we found 13 nm Cu2O NPs to be especially active with quantitative conversion of nitro groups to amines. The 13 nm Cu2O NPs also efficiently catalyze tandem reactions of ammonia borane, diisopropoxy-dinitrobenzene, and terephthalaldehyde, leading to a controlled polymerization and the facile synthesis of polybenzoxazole (PBO). The highly pure PBO (Mw = 19 kDa) shows much enhanced chemical stability than the commercial PBO against hydrolysis in boiling water or simulated seawater, demonstrating a great potential of using noble metal-free catalysts for green chemistry synthesis of PBO as a robust lightweight structural material for thermally and mechanically demanding applications.
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Affiliation(s)
- Huanqin Guan
- Department of Chemistry, Brown University, Providence, RI, 02912, USA.
| | - Mengqi Shen
- Department of Chemistry, Brown University, Providence, RI, 02912, USA.
| | - Cooro Harris
- Department of Chemistry, Brown University, Providence, RI, 02912, USA.
| | - Honghong Lin
- Department of Chemistry, Brown University, Providence, RI, 02912, USA.
| | - Kecheng Wei
- Department of Chemistry, Brown University, Providence, RI, 02912, USA.
| | - Michael Morales
- Department of Chemistry, Brown University, Providence, RI, 02912, USA.
| | - Noah Bronowich
- Department of Chemistry, Brown University, Providence, RI, 02912, USA.
| | - Shouheng Sun
- Department of Chemistry, Brown University, Providence, RI, 02912, USA.
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26
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Galeandro-Diamant T, Dardun V, Sougrati MT, stievano L, Lomachenko K, Veyre L, Meille V, Thieuleux C. The low temperature synthesis of very small and non‐crystalline iron‐based nanoparticles: application in alkene hydrosilylation. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Thomas Galeandro-Diamant
- CNRS: Centre National de la Recherche Scientifique CP2M - UMR 5128 CNRS-UCB Lyon 1-CPE Lyon FRANCE
| | - Vincent Dardun
- CNRS: Centre National de la Recherche Scientifique CP2M - UMR 5128 CNRS-UCB Lyon 1-CPE Lyon FRANCE
| | | | - Lorenzo stievano
- ICGM: Institut Charles Gerhardt de Montpellier ICGM - Equipe D4 FRANCE
| | | | - Laurent Veyre
- CNRS: Centre National de la Recherche Scientifique CP2M - UMR 5128 CNRS-UCB Lyon 1-CPE Lyon FRANCE
| | - Valerie Meille
- CNRS: Centre National de la Recherche Scientifique IRCELYON FRANCE
| | - Chloé Thieuleux
- CNRS Laboratory C2P2 UMR 5265-CNRS-Université de Lyon 1-CPE Lyon 43 Boulevard du 11 Novembre 69616 Villeurbanne FRANCE
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27
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Zaera F. Designing Sites in Heterogeneous Catalysis: Are We Reaching Selectivities Competitive With Those of Homogeneous Catalysts? Chem Rev 2022; 122:8594-8757. [PMID: 35240777 DOI: 10.1021/acs.chemrev.1c00905] [Citation(s) in RCA: 69] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A critical review of different prominent nanotechnologies adapted to catalysis is provided, with focus on how they contribute to the improvement of selectivity in heterogeneous catalysis. Ways to modify catalytic sites range from the use of the reversible or irreversible adsorption of molecular modifiers to the immobilization or tethering of homogeneous catalysts and the development of well-defined catalytic sites on solid surfaces. The latter covers methods for the dispersion of single-atom sites within solid supports as well as the use of complex nanostructures, and it includes the post-modification of materials via processes such as silylation and atomic layer deposition. All these methodologies exhibit both advantages and limitations, but all offer new avenues for the design of catalysts for specific applications. Because of the high cost of most nanotechnologies and the fact that the resulting materials may exhibit limited thermal or chemical stability, they may be best aimed at improving the selective synthesis of high value-added chemicals, to be incorporated in organic synthesis schemes, but other applications are being explored as well to address problems in energy production, for instance, and to design greener chemical processes. The details of each of these approaches are discussed, and representative examples are provided. We conclude with some general remarks on the future of this field.
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Affiliation(s)
- Francisco Zaera
- Department of Chemistry and UCR Center for Catalysis, University of California, Riverside, California 92521, United States
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28
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Loedolff MJ, Fuller RO, Nealon GL, Saunders M, Spackman MA, Koutsantonis GA. Solution-phase decomposition of ferrocene into wüstite-iron oxide core-shell nanoparticles. Dalton Trans 2022; 51:1603-1611. [PMID: 34994360 DOI: 10.1039/d1dt03222d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an improved method for the controlled solvent-phase decomposition of ferrocene into highly crystalline monodisperse iron oxide nanoparticles at relatively low temperatures. Solution-phase decomposition of ferrocene into nanoparticles has received little attention in the literature, due to the percieved stability of ferrocene. However, we synthesised wüstite FeO-iron oxide core-shell nanoparticles by thermally decomposing ferrocene in 1-octadecene solvent and in the presence of oleic acid and oleylamine, as surfactants. We report procedures that provide cubic and spherical core-shell iron oxide nanoparticles whose size (29.3 ± 2.3 nm for spheres, 38.6 ± 6.9 nm for distorted cubes and 23.5 ± 2.4 nm for distorted cubes with concave faces) and shape can be controlled through simple adjustments to reaction parameters. Transmission electron microscopy, scanning transmission electron microscopy, energy dispersive X-ray spectroscopy, electron energy-loss spectroscopy and powder X-ray diffraction analysis methods were used to characterise the nanoparticles.
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Affiliation(s)
- Matthys J Loedolff
- School of Molecular Sciences, The University of Western Australia (M310), 35 Stirling Highway, Crawley, Western Australia, 6009, Australia.
| | - Rebecca O Fuller
- School of Molecular Sciences, The University of Western Australia (M310), 35 Stirling Highway, Crawley, Western Australia, 6009, Australia.
| | - Gareth L Nealon
- Centre for Microscopy, Characterisation and Analysis (CMCA), The University of Western Australia (M310), 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Martin Saunders
- School of Molecular Sciences, The University of Western Australia (M310), 35 Stirling Highway, Crawley, Western Australia, 6009, Australia. .,Centre for Microscopy, Characterisation and Analysis (CMCA), The University of Western Australia (M310), 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Mark A Spackman
- School of Molecular Sciences, The University of Western Australia (M310), 35 Stirling Highway, Crawley, Western Australia, 6009, Australia.
| | - George A Koutsantonis
- School of Molecular Sciences, The University of Western Australia (M310), 35 Stirling Highway, Crawley, Western Australia, 6009, Australia.
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29
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Jia H, Sun J, Dong M, Dong H, Zhang H, Xie X. Deep eutectic solvent electrolysis for preparing water-soluble magnetic iron oxide nanoparticles. NANOSCALE 2021; 13:19004-19011. [PMID: 34755160 DOI: 10.1039/d1nr05813d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Magnetic iron oxide nanoparticles have been proven to have versatile applications in biomedicine. Although numerous strategies have been developed to synthesize hydrophilic magnetic nanoparticles, there is still a challenge in the quantity and controllability of preparation of highly dispersible, stably water-dispersive magnetic nanoparticles. The current work presents a deep-eutectic solvent electrolysis to synthesize magnetic nanoparticles. In the electrolysis process, iron atoms at the anode electrode are oxidized to ferric ions, and then the ferric ions are combined with reactive oxygen species that derived from the decomposition of deep-eutectic solvents to form iron oxide nanocrystals. Concomitantly, hydrophilic radicals of amine groups produced by electrolyte decomposition are grafted on the particles. The monodisperse nanoparticle size ranged from 6 to 9 nm. The hydrophilic group loaded nanoparticles can be highly dispersed in water with neither surface post-modification nor organic stabilizers. The hydrodynamic particle diameter is between 20 and 30 nm. The transparent aqueous dispersions can be maintained for more than 600 days without precipitation.
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Affiliation(s)
- Haiyang Jia
- School of Physics and New Energy, Xuzhou University of Technology, Xuzhou 221018, China.
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
| | - Jiawei Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
- College of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Meng Dong
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
| | - Hui Dong
- School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Hongtao Zhang
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
| | - Xiao Xie
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
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30
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Kim H, Im PW, Piao Y. A Facile Route for the Preparation of Monodisperse Iron nitride at Silica Core/shell Nanostructures. Front Bioeng Biotechnol 2021; 9:735727. [PMID: 34616720 PMCID: PMC8488142 DOI: 10.3389/fbioe.2021.735727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 08/31/2021] [Indexed: 11/13/2022] Open
Abstract
Uniform-sized iron oxide nanoparticles obtained from the solution phase thermal decomposition of the iron-oleate complex were encapsulated inside the silica shell by the reverse microemulsion technique, and then thermal treatment under NH3 to transfer the iron oxide to iron nitride. The transmission electron microscopy images distinctly demonstrated that the as-prepared iron nitride at silica core/shell nanostructures were highly uniform in particle-size distribution. By using iron oxide nanoparticles of 6.1, 10.3, 16.2, and 21.8 nm as starting materials, iron nitride nanoparticles with average diameters of 5.6, 9.3, 11.6, and 16.7 nm were produced, respectively. The acid-resistant properties of the iron nitride at silica core/shell nanostructures were found to be much higher than the starting iron oxide at silica. A superconducting quantum interference device was used for the magnetic characterization of the nanostructure. Besides, magnetic resonance imaging (MRI) studies using iron nitride at silica nanocomposites as contrast agents demonstrated T 2 enhanced effects that were dependent on the concentration. These core/shell nanostructures have enormous potential in magnetic nanodevice and biomedical applications. The current process is expected to be easy for large-scale and transfer other metal oxide nanoparticles.
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Affiliation(s)
- Hoonsub Kim
- Graduate School of Convergence Science and Technology, Seoul National University, Suwon, South Korea
| | - Pyung Won Im
- Department of Neurosurgery, Clinical Research Institute, Seoul National University Hospital, Seoul, South Korea.,Cancer Research Institute Ischemia/Hypoxia Disease Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Yuanzhe Piao
- Graduate School of Convergence Science and Technology, Seoul National University, Suwon, South Korea.,Advanced Institutes of Convergence Technology, Suwon, South Korea
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31
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Hu X, Yasa IC, Ren Z, Goudu SR, Ceylan H, Hu W, Sitti M. Magnetic soft micromachines made of linked microactuator networks. SCIENCE ADVANCES 2021; 7:7/23/eabe8436. [PMID: 34088661 PMCID: PMC8177716 DOI: 10.1126/sciadv.abe8436] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 04/20/2021] [Indexed: 05/03/2023]
Abstract
Soft untethered micromachines with overall sizes less than 100 μm enable diverse programmed shape transformations and functions for future biomedical and organ-on-a-chip applications. However, fabrication of such machines has been hampered by the lack of control of microactuator's programmability. To address such challenge, we use two-photon polymerization to selectively link Janus microparticle-based magnetic microactuators by three-dimensional (3D) printing of soft or rigid polymer microstructures or links. Sequentially, we position each microactuator at a desired location by surface rolling and rotation to a desired position and orientation by applying magnetic field-based torques, and then 3D printing soft or rigid links to connect with other temporarily fixed microactuators. The linked 2D microactuator networks exhibit programmed 2D and 3D shape transformations, and untethered limbless and limbed micromachine prototypes exhibit various robotic gaits for surface locomotion. The fabrication strategy presented here can enable soft micromachine designs and applications at the cellular scales.
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Affiliation(s)
- Xinghao Hu
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Immihan C Yasa
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Ziyu Ren
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Sandhya R Goudu
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Hakan Ceylan
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany.
| | - Wenqi Hu
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany.
| | - Metin Sitti
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany.
- Institute for Biomedical Engineering, ETH Zürich, 8092 Zürich, Switzerland
- School of Medicine and College of Engineering, Koç University, 34450 Istanbul, Turkey
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32
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Pandey S, Mukherjee D, Kshirsagar P, Patra C, Bodas D. Multiplexed bio-imaging using cadmium telluride quantum dots synthesized by mathematically derived process parameters in a continuous flow active microreactor. Mater Today Bio 2021; 11:100123. [PMID: 34458715 PMCID: PMC8379697 DOI: 10.1016/j.mtbio.2021.100123] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/15/2021] [Accepted: 07/17/2021] [Indexed: 12/14/2022] Open
Abstract
Quantum dots (QDs) are semiconductor nanocrystals with unique size-tunable emissions. To obtain a precise emission spectrum, monodispersity in size is imperative, which is achieved by controlling the reaction kinetics in a continuous flow of active microreactors. Further, a multivariate approach (dimensional analysis) is employed to impose stringent control on the reaction process resulting in monodispersed preparation of cadmium telluride (CdTe) quantum dots. Dimensional analysis knits multiple variables into a dimensionless mathematical form which not only predicts parameters precisely to obtain narrow size tunability but also guarantees reproducibility in synthesis. Analytical, structural, and optical characterization of the microreactor synthesized polydimethylsiloxane (PDMS) coated CdTe QDs reveal quantum efficient (61.5%), photostable (44%), and biocompatible nanocrystals of 5-15 nm. Further, PDMS-coated QDs (P-QDs) are conjugated with organelle-specific antibodies/biomarkers for in-vitro imaging in NIH 3T3 cells. Likewise, proliferating cell nuclear antigen (PCNA) and anti-myosin (MF20), cardiomyocytes antibodies are conjugated with P-QDs (red and green, respectively) to image the zebrafish's cardiac tissue. Antibodies tagged with quantum dots are imaged simultaneously using confocal microscopy. Thus, multiplexed bio-imaging of in-vitro and zebrafish tissue is demonstrated successfully. The results indicate the suitability of continuous flow active microreactor in conjunction with the mathematical prediction of process parameters to synthesize reproducibly monodispersed and quantum efficient QDs.
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Affiliation(s)
- S. Pandey
- Nanobioscience Group, Agharkar Research Institute, GG Agarkar Road, Pune, 411 004, India
- Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411 007, India
| | - D. Mukherjee
- Developmental Biology Group, Agharkar Research Institute, GG Agarkar Road, Pune, 411 004, India
| | - P. Kshirsagar
- Bioenergy Group, Agharkar Research Institute, GG Agarkar Road, Pune, 411 004, India
| | - C. Patra
- Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411 007, India
- Developmental Biology Group, Agharkar Research Institute, GG Agarkar Road, Pune, 411 004, India
| | - D. Bodas
- Nanobioscience Group, Agharkar Research Institute, GG Agarkar Road, Pune, 411 004, India
- Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411 007, India
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33
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Pekkari A, Wen X, Orrego-Hernández J, da Silva RR, Kondo S, Olsson E, Härelind H, Moth-Poulsen K. Synthesis of highly monodisperse Pd nanoparticles using a binary surfactant combination and sodium oleate as a reductant. NANOSCALE ADVANCES 2021; 3:2481-2487. [PMID: 36134156 PMCID: PMC9417948 DOI: 10.1039/d1na00052g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 02/24/2021] [Indexed: 06/16/2023]
Abstract
This study presents the synthesis of monodisperse Pd nanoparticles (NPs) stabilized by sodium oleate (NaOL) and hexadecyltrimethylammonium chloride (CTAC). The synthesis was conducted without traditional reductants and Pd-precursors are reduced by NaOL. It was confirmed that the alkyl double bond in NaOL is not the only explanation for the reduction of Pd-precursors since Pd NPs could be synthesized with CTAC and the saturated fatty acid sodium stearate (NaST). A quantitative evaluation of the reduction kinetics using UV-Vis spectroscopy shows that Pd NPs synthesized with both stabilizer combinations follow pseudo first-order reaction kinetics, where NaOL provides a faster and more effective reduction of Pd-precursors. The colloidal stabilization of the NP surface by CTAC and NaOL is confirmed by Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) analysis.
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Affiliation(s)
- Anna Pekkari
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden
| | - Xin Wen
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden
| | - Jessica Orrego-Hernández
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden
| | - Robson Rosa da Silva
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden
| | - Shun Kondo
- Nano and Biophysics, Department of Physics, Chalmers University of Technology 41296 Gothenburg Sweden
| | - Eva Olsson
- Nano and Biophysics, Department of Physics, Chalmers University of Technology 41296 Gothenburg Sweden
| | - Hanna Härelind
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden
| | - Kasper Moth-Poulsen
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden
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34
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Abstract
Electrosynthesis is to use electricity to drive chemical reactions for chemical synthesis and is potentially a green approach to fuel and energy sustainability. Nanostructured catalysts play an important role in promoting electrochemical reactions under green chemistry conditions. This perspective first provides a brief tutorial on electrosynthesis and the roles the nanocatalysts play in the synthesis. It then outlines the common strategies used to develop nanocatalysts for hydrogen evolution reaction, CO2 reduction reaction, and biomass upgrading. The perspective further summarizes the current methodologies that have been developed for scaling-up synthesis of nanocatalysts, which will be essential for the electrosynthesis to become a viable industry approach.
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Affiliation(s)
- Honghong Lin
- Department of Chemistry, Brown University, Providence, RI 02912, USA
| | - Kecheng Wei
- Department of Chemistry, Brown University, Providence, RI 02912, USA
| | - Zhouyang Yin
- Department of Chemistry, Brown University, Providence, RI 02912, USA
| | - Shouheng Sun
- Department of Chemistry, Brown University, Providence, RI 02912, USA
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35
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Li S, Nagarajan AV, Li Y, Kauffman DR, Mpourmpakis G, Jin R. The role of ligands in atomically precise nanocluster-catalyzed CO 2 electrochemical reduction. NANOSCALE 2021; 13:2333-2337. [PMID: 33464267 DOI: 10.1039/d0nr07832h] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Ligand effects are of major interest in catalytic reactions owing to their potential critical role in determining the reaction activity and selectivity. Herein, we report ligand effects in the CO2 electrochemical reduction reaction at the atomic level with three unique Au25 nanoclusters comprising the same kernel but different protecting ligands (-XR, where X = S or Se, and R represents the carbon tail). It is observed that a change in the carbon tail shows no obvious impact on the catalytic selectivity and activity, but the anchoring atom (X = S or Se) strongly affects the electrocatalytic selectivity. Specifically, the S site acts as the active site and sustains CO selectivity, while the Se site shows a higher tendency of hydrogen evolution. Density functional theory (DFT) calculations reveal that the energy penalty associated with the *COOH formation is lower on the S site by 0.26 eV compared to that on the Se site. Additionally, the formation energy of the product (*CO) is lower on the sulfur-based Au nanocluster by 0.43 eV. We attribute these energetic differences to the higher electron density on the sulfur sites of the Au nanocluster, resulting in a modified bonding character of the reaction intermediates that reduce the energetic penalty for the *COOH and *CO formation. Overall, this work demonstrates that S/Se atoms at the metal-ligand interface can play an important role in determining the overall electrocatalytic performance of Au nanoclusters.
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Affiliation(s)
- Site Li
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA. and National Energy Technology Laboratory (NETL), United States Department of Energy, Pittsburgh, Pennsylvania, USA.
| | | | - Yingwei Li
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
| | - Douglas R Kauffman
- National Energy Technology Laboratory (NETL), United States Department of Energy, Pittsburgh, Pennsylvania, USA.
| | - Giannis Mpourmpakis
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA.
| | - Rongchao Jin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
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36
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Shen M, Yu C, Guan H, Dong X, Harris C, Xiao Z, Yin Z, Muzzio M, Lin H, Robinson JR, Colvin VL, Sun S. Nanoparticle-Catalyzed Green Chemistry Synthesis of Polybenzoxazole. J Am Chem Soc 2021; 143:2115-2122. [PMID: 33493397 DOI: 10.1021/jacs.0c12488] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Enabling catalysts to promote multistep chemical reactions in a tandem fashion is an exciting new direction for the green chemistry synthesis of materials. Nanoparticle (NP) catalysts are particularly well suited for tandem reactions due to the diverse surface-active sites they offer. Here, we report that AuPd alloy NPs, especially 3.7 nm Au42Pd58 NPs, catalyze one-pot reactions of formic acid, diisopropoxy-dinitrobenzene, and terephthalaldehyde, yielding a very pure thermoplastic rigid-rod polymer, polybenzoxazole (PBO), with a molecular weight that is tunable from 5.8 to 19.1 kDa. The PBO films are more resistant to hydrolysis and possess thermal and mechanical properties that are superior to those of commercial PBO, Zylon. Cu NPs are also active in catalyzing tandem reactions to form PBO when formic acid is replaced with ammonia borane. Our work demonstrates a general approach to the green chemistry synthesis of rigid-rod polymers as lightweight structural materials for broad thermomechanical applications.
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Affiliation(s)
- Mengqi Shen
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Chao Yu
- Department of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu Province 212003, P. R. China
| | - Huanqin Guan
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Xiang Dong
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Cooro Harris
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Zhen Xiao
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Zhouyang Yin
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Michelle Muzzio
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Honghong Lin
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Jerome R Robinson
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Vicki L Colvin
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Shouheng Sun
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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37
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Bose P, Chakraborty P, Mohanty JS, Ray Chowdhuri A, Khatun E, Ahuja T, Mahendranath A, Pradeep T. Atom transfer between precision nanoclusters and polydispersed nanoparticles: a facile route for monodisperse alloy nanoparticles and their superstructures. NANOSCALE 2020; 12:22116-22128. [PMID: 33118573 DOI: 10.1039/d0nr04033a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Reactions between atomically precise noble metal nanoclusters (NCs) have been studied widely in the recent past, but such processes between NCs and plasmonic nanoparticles (NPs) have not been explored earlier. For the first time, we demonstrate spontaneous reactions between an atomically precise NC, Au25(PET)18 (PET = 2-phenylethanethiol), and polydispersed silver NPs with an average diameter of 4 nm and protected with PET, resulting in alloy NPs under ambient conditions. These reactions were specific to the nature of the protecting ligands as no reaction was observed between the Au25(SBB)18 NC (SBB = 4-(tert-butyl)benzyl mercaptan) and the very same silver NPs. The mechanism involves an interparticle exchange of the metal and ligand species where the metal-ligand interface plays a vital role in controlling the reaction. The reaction proceeds through transient Au25-xAgx(PET)n alloy cluster intermediates as observed in time-dependent electrospray ionization mass spectrometry (ESI MS). High-resolution transmission electron microscopy (HRTEM) analysis of the resulting dispersion showed the transformation of polydispersed silver NPs into highly monodisperse gold-silver alloy NPs which assembled to form 2-dimensional superlattices. Using NPs of other average sizes (3 and 8 nm), we demonstrated that size plays an important role in the reactivity as observed in ESI MS and HRTEM.
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Affiliation(s)
- Paulami Bose
- DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India.
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38
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Hou Z, Liu Y, Xu J, Zhu J. Surface engineering of magnetic iron oxide nanoparticles by polymer grafting: synthesis progress and biomedical applications. NANOSCALE 2020; 12:14957-14975. [PMID: 32648868 DOI: 10.1039/d0nr03346d] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Magnetic iron oxide nanoparticles (IONPs) have wide applications in magnetic resonance imaging (MRI), biomedicine, drug delivery, hyperthermia therapy, catalysis, magnetic separation, and others. However, these applications are usually limited by irreversible agglomeration of IONPs in aqueous media because of their dipole-dipole interactions, and their poor stability. A protecting polymeric shell provides IONPs with not only enhanced long-term stability, but also the functionality of polymer shells. Therefore, polymer-grafted IONPs have recently attracted much attention of scientists. In this tutorial review, we will present the current strategies for grafting polymers onto the surface of IONPs, basically including "grafting from" and "grafting to" methods. Available functional groups and chemical reactions, which could be employed to bind polymers onto the IONP surface, are comprehensively summarized. Moreover, the applications of polymer-grafted IONPs will be briefly discussed. Finally, future challenges and perspectives in the synthesis and application of polymer-grafted IONPs will also be discussed.
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Affiliation(s)
- Zaiyan Hou
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
| | - Yijing Liu
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
| | - Jiangping Xu
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
| | - Jintao Zhu
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
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Hu Y, Tang Y, Zhang XJ, Yang XT, Tang YY, Li S, Hu L, Chen P, Zhu D. Dendritic cells reprogrammed by CEA messenger RNA loaded multi-functional silica nanospheres for imaging-guided cancer immunotherapy. Biomater Sci 2020; 8:3026-3031. [PMID: 32347238 DOI: 10.1039/d0bm00395f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The application and understanding of dendritic cell (DC) based immune cancer therapy are largely hindered by insufficient or improper presentation of antigens and the inability to track the homing of reprogrammed DCs to draining lymph nodes in real-time. To tackle these challenges, multi-functional and hierarchically structured silica nanospheres are rationally designed and fabricated, which encapsulate quantum dots to permit near infrared deep tissue imaging and are loaded with carcinoembryonic antigen messenger RNA (CEAmRNA) to enable stable and abundant antigen expression in DCs. After being injected into animals and inducing an antigen-specific immune response, the homing process of reprogrammed labelled DCs from peripheral tissues to draining lymph nodes can be simultaneously and precisely tracked. Significant inhibition of tumor growth is achieved via strong antigen-specific immune responses including induced DC maturation, enhanced T cell proliferation and cytotoxic T lymphocyte (CTL)-mediated responses. Both in vitro and in vivo experiments demonstrate the high effectiveness of this new strategy of imaging-guided cancer immunotherapy by using reprogrammed DCs as immunotherapeutic and tracking agents.
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Affiliation(s)
- Yue Hu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, P. R. China.
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Gavriil V, Chatzichristidi M, Christofilos D, Kourouklis GA, Kollia Z, Bakalis E, Cefalas AC, Sarantopoulou E. Entropy and Random Walk Trails Water Confinement and Non-Thermal Equilibrium in Photon-Induced Nanocavities. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1101. [PMID: 32498312 PMCID: PMC7353189 DOI: 10.3390/nano10061101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/18/2020] [Accepted: 05/22/2020] [Indexed: 01/18/2023]
Abstract
Molecules near surfaces are regularly trapped in small cavitations. Molecular confinement, especially water confinement, shows intriguing and unexpected behavior including surface entropy adjustment; nevertheless, observations of entropic variation during molecular confinement are scarce. An experimental assessment of the correlation between surface strain and entropy during molecular confinement in tiny crevices is difficult because strain variances fall in the nanometer scale. In this work, entropic variations during water confinement in 2D nano/micro cavitations were observed. Experimental results and random walk simulations of water molecules inside different size nanocavitations show that the mean escaping time of molecular water from nanocavities largely deviates from the mean collision time of water molecules near surfaces, crafted by 157 nm vacuum ultraviolet laser light on polyacrylamide matrixes. The mean escape time distribution of a few molecules indicates a non-thermal equilibrium state inside the cavity. The time differentiation inside and outside nanocavities reveals an additional state of ordered arrangements between nanocavities and molecular water ensembles of fixed molecular length near the surface. The configured number of microstates correctly counts for the experimental surface entropy deviation during molecular water confinement. The methodology has the potential to identify confined water molecules in nanocavities with life science importance.
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Affiliation(s)
- Vassilios Gavriil
- National Hellenic Research Foundation, Theoretical and Physical Chemistry Institute, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece; (V.G.); (Z.K.); (E.B.); (A.-C.C.)
- School of Chemical Engineering and Physics Laboratory, Faculty of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (D.C.); (G.A.K.)
| | - Margarita Chatzichristidi
- Department of Chemistry, Laboratory of Industrial Chemistry, Panepistimiopolis Zografou, National and Kapodistrian University of Athens, 15771 Athens, Greece;
| | - Dimitrios Christofilos
- School of Chemical Engineering and Physics Laboratory, Faculty of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (D.C.); (G.A.K.)
| | - Gerasimos A. Kourouklis
- School of Chemical Engineering and Physics Laboratory, Faculty of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (D.C.); (G.A.K.)
| | - Zoe Kollia
- National Hellenic Research Foundation, Theoretical and Physical Chemistry Institute, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece; (V.G.); (Z.K.); (E.B.); (A.-C.C.)
| | - Evangelos Bakalis
- National Hellenic Research Foundation, Theoretical and Physical Chemistry Institute, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece; (V.G.); (Z.K.); (E.B.); (A.-C.C.)
- Dipartimento di Chimica “G. Giamician” University di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Alkiviadis-Constantinos Cefalas
- National Hellenic Research Foundation, Theoretical and Physical Chemistry Institute, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece; (V.G.); (Z.K.); (E.B.); (A.-C.C.)
| | - Evangelia Sarantopoulou
- National Hellenic Research Foundation, Theoretical and Physical Chemistry Institute, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece; (V.G.); (Z.K.); (E.B.); (A.-C.C.)
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Mac Fhionnlaoich N, Guldin S. Information Entropy as a Reliable Measure of Nanoparticle Dispersity. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2020; 32:3701-3706. [PMID: 32581425 PMCID: PMC7304839 DOI: 10.1021/acs.chemmater.0c00539] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 04/08/2020] [Indexed: 05/15/2023]
Abstract
Nanoparticle size impacts properties vital to applications ranging from drug delivery to diagnostics and catalysis. As such, evaluating nanoparticle size dispersity is of fundamental importance. Conventional approaches, such as standard deviation, usually require the nanoparticle population to follow a known distribution and are ill-equipped to deal with highly poly- or heterodisperse populations. Herein, we propose the use of information entropy as an alternative and assumption-free method for describing nanoparticle size distributions. This measure works equally well for mono-, poly-, and heterodisperse populations and represents an unbiased route to evaluation and optimization of nanoparticle synthesis. We provide intuitive software tools for analysis and supply guidelines for interpretation with respect to known standards.
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Zhou BX, Ding SS, Wang Y, Wang XR, Huang WQ, Li K, Huang GF. Type-II/type-II band alignment to boost spatial charge separation: a case study of g-C 3N 4 quantum dots/a-TiO 2/r-TiO 2 for highly efficient photocatalytic hydrogen and oxygen evolution. NANOSCALE 2020; 12:6037-6046. [PMID: 32129406 DOI: 10.1039/d0nr00176g] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Efficient spatial charge separation and transfer that are critical factors for solar energy conversion primarily depend on the energetic alignment of the band edges at interfaces in heterojunctions. Herein, we first report that constructing a 0D/0D type-II(T-II)/T-II heterojunction is an effective strategy to ingeniously achieve long-range charge separation by taking a ternary heterojunction of TiO2 and graphitic carbon nitride (g-C3N4) as a proof-of-concept. Incorporating g-C3N4 quantum dots (QCN), as the third component, into the commercial P25 composed of anatase (a-TiO2) and rutile (r-TiO2) can be realized via simply mixing the commercially available Degussa P25 and QCN solution followed by heat treatment. The strong coupling and matching band structures among a-TiO2, r-TiO2 and QCN result in the construction of novel T-II/T-II heterojunctions, which would promote the spatial separation and transfer of photogenerated electrons and holes. Moreover, QCN plays a key role in reinforcing light absorption. Particularly, the unique 0D/0D architecture possesses the advantages of abundant active sites for the photocatalytic reaction. As a result, the optimized QCN/a-TiO2/r-TiO2 heterojunctions exhibit enhanced photocatalytic H2 and O2 evolution, especially the hydrogen evolution rate (49.3 μmol h-1) is 11.7 times that of bare P25 under visible light irradiation, and sufficient catalytic stability as evidenced by the recycling experiments. The remarkably enhanced photocatalytic activity can be attributed to the synergistic effects of the energy level alignment at interfaces, the dimensionality and component of the heterojunctions. This work provides a stepping stone towards the design of novel heterojunctions for photocatalytic water splitting.
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Affiliation(s)
- Bing-Xin Zhou
- Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China.
| | - Shuang-Shuang Ding
- Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China.
| | - Yan Wang
- Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China.
| | - Xiao-Rui Wang
- Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China.
| | - Wei-Qing Huang
- Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China.
| | - Kai Li
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
| | - Gui-Fang Huang
- Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China.
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Wang P, Shi X, Fu C, Li X, Li J, Lv X, Chu Y, Dong F, Jiang G. Strong pyrrolic-N-Pd interactions boost the electrocatalytic hydrodechlorination reaction on palladium nanoparticles. NANOSCALE 2020; 12:843-850. [PMID: 31830178 DOI: 10.1039/c9nr07528c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We demonstrated that heteroatomic nitrogen (N) doping of graphene can significantly enhance the performance of the graphene-palladium nanoparticle composite catalyst (N/G-Pd) in the electrocatalytic hydrodechlorination (EHDC) reaction. Specifically at -0.80 V (vs. Ag/AgCl), the N/G-430-Pd (prepared at 430 °C, pyridinic/pyrrolic-N-rich) and N/G-900-Pd (prepared at 900 °C, pyridinic/graphitic-N-rich) with equivalent total N content delivered the apparent rate constants (kobs) of 0.28 and 0.20 min-1 molPd-1 in removing 2,4-dichlorophenol, much higher than the 0.13 min-1 molPd-1 of the C-Pd. Additionally, we identified the determinant role of pyrrolic-N in boosting EHDC from the linear relationship between kobs-N and the pyrrolic-N content in the catalyst. Combined experimental and DFT analyses revealed that the positive effect of N doping originated from the strong N-Pd interactions, which modulated the Pd electronic structure and its interactions with the reactant and EHDC products (phenol and Cl-). The pyrrolic N-Pd bond was favorable as it could balance the reactant adsorption and the product desorption.
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Affiliation(s)
- Peng Wang
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China.
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Hanif F, Liu Y, Liu J, Song C, Zhang L, Lin H, Lu R, Zhang S. Ammonia-controlled synthesis of monodispersed N-doped carbon nanoparticles. NEW J CHEM 2020. [DOI: 10.1039/d0nj02924f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The presence of ammonia slowing down the acid-catalysed Schiff base formation as well as control the monodispersity through the separation of nucleation and growth stages.
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Affiliation(s)
- Farzana Hanif
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Yingcen Liu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Jihong Liu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Caicheng Song
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Liyan Zhang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Hua Lin
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Rongwen Lu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Shufen Zhang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- P. R. China
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Fu SS, Ren XY, Guo S, Lan G, Zhang ZM, Lu TB, Lin W. Synergistic Effect over Sub-nm Pt Nanocluster@MOFs Significantly Boosts Photo-oxidation of N-alkyl(iso)quinolinium Salts. iScience 2019; 23:100793. [PMID: 31958757 PMCID: PMC6992937 DOI: 10.1016/j.isci.2019.100793] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 12/10/2019] [Accepted: 12/18/2019] [Indexed: 11/17/2022] Open
Abstract
Quinolones and isoquinolones are of interest to pharmaceutical industry owing to their potent biological activities. Herein, we first encapsulated sub-nm Pt nanoclusters into Zr-porphyrin frameworks to afford an efficient photocatalyst Pt0.9@PCN-221. This catalyst can dramatically promote electron-hole separation and 1O2 generation to achieve synergistic effect first in the metal-organic framework (MOF) system, leading to the highest activity in photosynthesis of (iso)quinolones in >90.0% yields without any electronic sacrificial agents. Impressively, Pt0.9@PCN-221 was reused 10 times without loss of activity and can catalyze gram-scale synthesis of 1-methyl-5-nitroisoquinolinone at an activity of 175.8 g·gcat−1, 22 times higher than that of PCN-221. Systematic investigations reveal the contribution of synergistic effect of photogenerated electron, photogenerated hole, and 1O2 generation for efficient photo-oxidation, thus highlighting a new strategy to integrate multiple functional components into MOFs to synergistically catalyze complex photoreactions for exploring biologically active heterocyclic molecules. A state-of-the-art photocatalyst for preparation of bioactive (iso)quinolones Synergistic catalysis of photogenerated e−/h+ and 1O2 Sub-nm Pt0.9@PCN-221 with a high efficiency of e−-h+ separation and 1O2 generation
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Affiliation(s)
- Shan-Shan Fu
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Xiu-Ying Ren
- College of Chemistry, Northeast Normal University, Changchun 130024, P.R. China
| | - Song Guo
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Guangxu Lan
- Department of Chemistry, University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
| | - Zhi-Ming Zhang
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China; College of Chemistry, Northeast Normal University, Changchun 130024, P.R. China.
| | - Tong-Bu Lu
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Wenbin Lin
- Department of Chemistry, University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
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