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Pinto de Sousa B, Fateixa S, Trindade T. Surface-Enhanced Raman Scattering Using 2D Materials. Chemistry 2024; 30:e202303658. [PMID: 38530022 DOI: 10.1002/chem.202303658] [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: 11/04/2023] [Revised: 03/01/2024] [Accepted: 03/25/2024] [Indexed: 03/27/2024]
Abstract
The use of surface-enhanced Raman scattering (SERS) as a technique for detecting small amounts of (bio)chemical analytes has become increasingly popular in various fields. While gold and silver nanostructures have been extensively studied as SERS substrates, the availability of other types of substrates is currently expanding the applications of this spectroscopic method. Recently, researchers have begun exploring two-dimensional (2D) materials (e. g., graphene-like nanostructures) as substrates for SERS analysis. These materials offer unique optical properties, a well-defined structure, and the ability to modify their surface chemistry. As a contribution to advance this field, this concept article highlights the significance of understanding the chemical mechanism that underlies the experimental Raman spectra of chemisorbed molecules onto 2D materials' surfaces. Therefore, the article discusses recent advancements in fabricating substrates using 2D layered materials and the synergic effects of using their metallic composites for SERS applications. Additionally, it provides a new perspective on using Raman imaging in developing 2D materials as analytical platforms for Raman spectroscopy, an exciting emerging research area with significant potential.
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Affiliation(s)
- Beatriz Pinto de Sousa
- Department of Chemistry and CICECO - Aveiro Materials Institute, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Sara Fateixa
- Department of Chemistry and CICECO - Aveiro Materials Institute, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Tito Trindade
- Department of Chemistry and CICECO - Aveiro Materials Institute, University of Aveiro, 3810-193, Aveiro, Portugal
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2
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Denis PA. Chemical reactivity of graphene doped with 3d transition metals: nothing compares to a single vacancy. J Mol Model 2024; 30:96. [PMID: 38446327 DOI: 10.1007/s00894-024-05893-5] [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: 12/14/2023] [Accepted: 02/29/2024] [Indexed: 03/07/2024]
Abstract
CONTEXT Finding catalysts that do not rely on the use of expensive metals is one of the requirements to achieve sustainable production. The reactivity of graphene doped with 3d transition metals was studied. All dopants enhanced the reactivity of graphene and performed better than Stone-Wales defects and divacancies, but were inferior to monovacancies. For hydrogenation of doped-monovacancies, Sc, Ti, Cr, Co, and Ni induced more prominent reactivity on the carbon atoms. However, the metals were the most reactive center for V, Mn, and Fe-doped graphene. Cu and Zn turned the four neighboring carbon atoms into the preferred sites for hydrogenation. The addition of oxygen to doped graphene with Ti, V, Cr, Mn, Fe, Co, and Ni on a monovacancy revealed a more uniform pattern since the metal, preferred to react with oxygen. However, Sc induced a larger reactivity on the carbon atoms. The affinity of the 3d metal-doped graphene systems towards oxygen was inferior to that observed for single-vacancies. Therefore, vacancy engineering is the most favorable and least expensive method to enhance the reactivity of graphene. METHODS We applied Truhlar's M06-L method accompanied by the 6-31G* basis sets to perform periodic boundary conditions calculations as implemented in Gaussian 09. The ultrafine grid was employed and the unit cells were sampled employing 100 k-points. Results were visualized employing Gaussview 5.0.1.
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Affiliation(s)
- Pablo A Denis
- Computational Nanotechnology, DETEMA, Facultad de Química, UDELAR, CC 1157, 11800, Montevideo, Uruguay.
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3
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Parambath JBM, Abla F, Arooj M, Mohamed AA. Doping matters in carbon nanomaterial efficiency in environmental remediation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:124921-124933. [PMID: 36609974 DOI: 10.1007/s11356-023-25147-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 12/30/2022] [Indexed: 06/17/2023]
Abstract
Carbon nanomaterials (CNMs) are rapidly emerging in materials science research due to their widespread environmental applications. They are useful for environmental pollutants' remediation through various methods. Heteroatom doping resulted in reliable approaches to overcome pristine CNMs challenges. The engineering of the dopants is believed to be a promising route to improve the efficiency of CNMs in environmental remediation. The idea of doping has been attractive since it allows the control of electronic properties due to the electron transfer between dopants and the host material and the dopants along with the bonding between analogous atoms and carbon atoms. This mini-review, through computational and experimental studies, puts special emphasis on the role of doping different CNMs as an efficient approach to enhance the environmental remediation.
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Affiliation(s)
- Javad B M Parambath
- Department of Chemistry, College of Sciences, University of Sharjah, 27272, Sharjah, United Arab Emirates
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates
| | - Fatima Abla
- Department of Chemistry, College of Sciences, University of Sharjah, 27272, Sharjah, United Arab Emirates
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates
| | - Mahreen Arooj
- Department of Chemistry, College of Sciences, University of Sharjah, 27272, Sharjah, United Arab Emirates
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates
| | - Ahmed A Mohamed
- Department of Chemistry, College of Sciences, University of Sharjah, 27272, Sharjah, United Arab Emirates.
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates.
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4
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Ullah Z, Jee Kim H, Sheena Mary Y, Belboukhari N, Sekkoum K, Kraimi A, Zhan X, Wook Kwon H. Unlocking the Potential of Ovalene: A Dual-Purpose Sensor and Drug Enhancer. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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5
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Denis PA. Heteroatom Codoped Graphene: The Importance of Nitrogen. ACS OMEGA 2022; 7:45935-45961. [PMID: 36570263 PMCID: PMC9773818 DOI: 10.1021/acsomega.2c06010] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Although graphene has exceptional properties, they are not enough to solve the extensive list of pressing world problems. The substitutional doping of graphene using heteroatoms is one of the preferred methods to adjust the physicochemical properties of graphene. Much effort has been made to dope graphene using a single dopant. However, in recent years, substantial efforts have been made to dope graphene using two or more dopants. This review summarizes all the hard work done to synthesize, characterize, and develop new technologies using codoped, tridoped, and quaternary doped graphene. First, I discuss a simple question that has a complicated answer: When can an atom be considered a dopant? Then, I briefly discuss the single atom doped graphene as a starting point for this review's primary objective: codoped or dual-doped graphene. I extend the discussion to include tridoped and quaternary doped graphene. I review most of the systems that have been synthesized or studied theoretically and the areas in which they have been used to develop new technologies. Finally, I discuss the challenges and prospects that will shape the future of this fascinating field. It will be shown that most of the graphene systems that have been reported involve the use of nitrogen, and much effort is needed to develop codoped graphene systems that do not rely on the stabilizing effects of nitrogen. I expect that this review will contribute to introducing more researchers to this fascinating field and enlarge the list of codoped graphene systems that have been synthesized.
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6
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Suryawanshi R, Kurrey R, Sahu S, Ghosh KK. Facile and scalable synthesis of un-doped, doped and co-doped graphene quantum dots: a comparative study on their impact for environmental applications. RSC Adv 2022; 13:701-719. [PMID: 36605643 PMCID: PMC9782860 DOI: 10.1039/d2ra05275j] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 10/20/2022] [Indexed: 12/24/2022] Open
Abstract
In recent years, graphene quantum dots (GQDs) received huge attention due to their unique properties and potential applicability in different area. Here, we report simple and facile method for the synthesis of GQDs and their functionalization by doping and co-doping using different heteroatom under the optimized conditions. The doping and co-doping of GQDs using boron and nitrogen have been confirmed by FTIR and TEM. The UV-visible and fluorescence techniques have been used to study the optical properties and stability of functionalized GQDs. Further, the screening for enhancement of quantum yields of all GQDs were performed with fluorescence and UV-visible spectra under the optimized conditions. The average QY was obtained as 16.0%, 83.6%, 18.2% and 29.6% for GQDs, B-GQDs, N-GQDs and B,N-GQDs, respectively. The sensor was used to determine paraoxon in water samples. The LOD was observed to be 1.0 × 10-4 M with linearity range of 0.001 to 0.1 M. The RSD was calculated for the developed B,N-GQDs based sensor and observed to be 2.99% with the regression coefficient as 0.997. All the doped, co-doped and un-doped GQDs possess remarkable properties as a fluorescent probe.
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Affiliation(s)
- Reena Suryawanshi
- School of Studies in Chemistry, Pt. Ravishankar Shukla UniversityRaipur-492010ChhattisgarhIndia
| | - Ramsingh Kurrey
- School of Studies in Chemistry, Pt. Ravishankar Shukla UniversityRaipur-492010ChhattisgarhIndia
| | - Sushama Sahu
- School of Studies in Chemistry, Pt. Ravishankar Shukla UniversityRaipur-492010ChhattisgarhIndia
| | - Kallol K. Ghosh
- School of Studies in Chemistry, Pt. Ravishankar Shukla UniversityRaipur-492010ChhattisgarhIndia
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7
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Zhou T, Xu C, Ren W. Grain-Boundary-Induced Ultrasensitive Molecular Detection of Graphene Film. NANO LETTERS 2022; 22:9380-9388. [PMID: 36455614 DOI: 10.1021/acs.nanolett.2c03218] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Graphene has been considered a promising platform for molecular detection due to the graphene-enhanced Raman scattering (GERS) effect. However, the GERS performance of pristine graphene is limited by a low chemically active surface and insufficient density of states (DOS). Although diverse defects have been introduced, it remains a great challenge to improve the enhancement performance. Here, we show that graphene grain boundaries (GBs) possess stronger adsorption capacity and more abundant DOS. Thus, GERS performance increases with the atomic percentage of GBs, which makes nanocrystalline graphene (NG) film a superior GERS substrate. For R6G as a probe molecule, a low detection limit of 3 × 10-10 M was achieved. Utilizing the high chemical activity of GBs, we also fabricated NG film decorated with Au particles using a one-step quenching strategy, and this hybrid film exhibits an extremely low limit of detection down to 5 × 10-11 M, outperforming all the reported graphene-based systems.
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Affiliation(s)
- Tianya Zhou
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang110016, P. R. China
| | - Chuan Xu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang110016, P. R. China
| | - Wencai Ren
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang110016, P. R. China
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8
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Adsorption behavior of hydrogen selenide gas on the surfaces of pristine and Ni-doped X12Y12 (X=Al, B and Y=N, P) nano-cages: a first-principles study. Struct Chem 2022. [DOI: 10.1007/s11224-022-02105-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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9
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Ma R, Wang K, Li C, Wang C, Habibi-Yangjeh A, Shan G. N-doped graphene for electrocatalytic O 2 and CO 2 reduction. NANOSCALE ADVANCES 2022; 4:4197-4209. [PMID: 36321144 PMCID: PMC9552757 DOI: 10.1039/d2na00348a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 08/29/2022] [Indexed: 06/16/2023]
Abstract
The electrocatalytic CO2 reduction reaction (CO2RR) and oxygen reduction reaction (ORR) are important approaches to realize energy conversion and sustainable development. However, sluggish reaction kinetics severely hinders the practical application of devices related to these reactions. N-doped graphene (NG) with unique properties exhibits great potential in catalyzing the CO2RR and ORR, which is attributed to the electron redistribution. In this review, we start from the fundamental properties of NG, especially emphasizing the changes caused by N doping. Then the synthetic methods are summarized by classifying them into top-down strategies and bottom-up strategies. Subsequently, the applications of NG in the ORR and CO2RR are discussed and the effects of electronic structure on the electrocatalytic activity are highlighted. Finally, we give our own perspective on the future research direction of NG in the applications of the ORR and CO2RR.
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Affiliation(s)
- Ruguang Ma
- School of Materials Science and Engineering, Suzhou University of Science and Technology 99 Xuefu Road Suzhou 215011 China
| | - Kuikui Wang
- Institute of Materials for Energy and Environment, Laboratory of New Fiber Materials and Modern Textile, Growing Basis for State Key Laboratory, College of Materials Science and Engineering, Qingdao University Qingdao 266071 China
| | - Chunjie Li
- School of Materials Science and Engineering, Suzhou University of Science and Technology 99 Xuefu Road Suzhou 215011 China
| | - Chundong Wang
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, Huazhong University of Science and Technology Wuhan 430074 PR China
| | - Aziz Habibi-Yangjeh
- Department of Chemistry, Faculty of Science, University of Mohaghegh Ardabili Ardabil Iran
| | - Guangcun Shan
- School of Instrumentation Science and Opto-electronics Engineering, Beihang University No. 37 XueYuan Road Beijing 100083 China
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10
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Ji C, Lu J, Shan B, Li F, Zhao X, Yu J, Xu S, Man B, Zhang C, Li Z. The Origin of Mo 2C Films for Surface-Enhanced Raman Scattering Analysis: Electromagnetic or Chemical Enhancement? J Phys Chem Lett 2022; 13:8864-8871. [PMID: 36125003 DOI: 10.1021/acs.jpclett.2c02392] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The relatively weak Raman enhanced factors of semiconductor-based substrate limit its further application in surface-enhanced Raman scattering (SERS). Here, a kind of two-dimensional (2D) semimetal material, molybdenum carbide (Mo2C) film, is prepared via a chemical vapor deposition (CVD) method, and the origin of SERS is investigated for the first time. The detection limits of the prepared Mo2C films for crystal violet (CV) and rhodamine 6G (R6G) molecules are low at 10-6 M and 10-8 M, respectively. Our detailed theoretical analysis, based on density functional theory and the finite element method, demonstrates that the enhancement of the 2D Mo2C film is indeed CM in nature rather than the EM effects. Besides, the basic doping strategies are proposed to further optimize the SERS sensitivity of Mo2C for Fermi level regulation. We believe this work will provide a helpful guide for developing a highly sensitive semimetal SERS substrate.
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Affiliation(s)
- Chang Ji
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
| | - Jinxuan Lu
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
| | - Baojie Shan
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
| | - Fengrui Li
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
| | - Xiaofei Zhao
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
| | - Jing Yu
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
| | - Shicai Xu
- Shandong Key Laboratory of Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, P.R. China
| | - Baoyuan Man
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
| | - Chao Zhang
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
| | - Zhen Li
- Shandong Provincial Engineering and Technical Center of Light Manipulation, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China
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11
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Zhang E, Wu YC, Shao H, Klimavicius V, Zhang H, Taberna PL, Grothe J, Buntkowsky G, Xu F, Simon P, Kaskel S. Unraveling the Capacitive Charge Storage Mechanism of Nitrogen-Doped Porous Carbons by EQCM and ssNMR. J Am Chem Soc 2022; 144:14217-14225. [PMID: 35914237 DOI: 10.1021/jacs.2c04841] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Fundamental understanding of ion electroadsorption processes in porous electrodes on a molecular level provides important guidelines for next-generation energy storage devices like electric double layer capacitors (EDLCs). Porous carbons functionalized by heteroatoms show enhanced capacitive performance, but the underlying mechanism is still elusive, due to the lack of reliable tools to precisely identify multiple N species and establish clear structure property relations. Here, we use advanced analytical techniques such as low-temperature solid-state NMR (ssNMR) and electrochemical quartz crystal microbalance (EQCM) to relate the complex nitrogen functionalities to the charging mechanisms and capacitive performance. For the first time, it is demonstrated at a molecular level that N-doping strongly influences the electroadsorption mechanism in EDLCs. Without N-doping, anion (SO42-) adsorption-desorption dominates the charging mechanism, whereas after doping, Li+ electroadsorption plays a key role. With the help of EQCM, it is demonstrated that SO42- is strongly immobilized on the N-doped surface, leaving Li+ as the main charge carrier. The smaller size and higher concentration of Li+ compared to SO42- benefit a higher capacitance. Amine/amide N is responsible for high capacitance, but surprisingly the pyridinic, pyrrolic, and graphitic N groups have no significant influence. 2D 1H-15N NMR spectroscopy indicates that the conversion from pyridinium to pyrrolic N gives rise to a slightly decreased capacitance. This work not only demonstrates ssNMR as a powerful tool for surface chemistry characterization of electrode materials but also uncovers the related charging mechanism by EQCM, paving the way toward a comprehensive picture of EDLC chemistry.
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Affiliation(s)
- En Zhang
- Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, Dresden 01069, Germany
| | - Yih-Chyng Wu
- Université Paul Sabatier, CIRIMAT UMR CNRS 5085, Toulouse 31062, France.,Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, Amiens 80039, France
| | - Hui Shao
- Université Paul Sabatier, CIRIMAT UMR CNRS 5085, Toulouse 31062, France.,Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, Amiens 80039, France
| | - Vytautas Klimavicius
- Institute of Chemical Physics, Vilnius University, Sauletekio av. 3, Vilnius LT-10257, Lithuania.,Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technical University Darmstadt, Alarich-Weiss-Straße 8, Darmstadt 64287, Germany
| | - Hanyue Zhang
- Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, Dresden 01069, Germany
| | | | - Julia Grothe
- Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, Dresden 01069, Germany
| | - Gerd Buntkowsky
- Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technical University Darmstadt, Alarich-Weiss-Straße 8, Darmstadt 64287, Germany
| | - Fei Xu
- Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, Dresden 01069, Germany
| | - Patrice Simon
- Université Paul Sabatier, CIRIMAT UMR CNRS 5085, Toulouse 31062, France.,Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, Amiens 80039, France
| | - Stefan Kaskel
- Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, Dresden 01069, Germany.,Fraunhofer Institute for Material and Beam Technology (IWS), Winterbergstraße 28, Dresden 01277, Germany
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12
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13
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Bhatt MD, Kim H, Kim G. Various defects in graphene: a review. RSC Adv 2022; 12:21520-21547. [PMID: 35975063 PMCID: PMC9347212 DOI: 10.1039/d2ra01436j] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 07/19/2022] [Indexed: 11/23/2022] Open
Abstract
Pristine graphene has been considered one of the most promising materials because of its excellent physical and chemical properties. However, various defects in graphene produced during synthesis or fabrication hinder its performance for applications such as electronic devices, transparent electrodes, and spintronic devices. Due to its intrinsic bandgap and nonmagnetic nature, it cannot be used in nanoelectronics or spintronics. Intrinsic and extrinsic defects are ultimately introduced to tailor electronic and magnetic properties and take advantage of their hidden potential. This article emphasizes the current advancement of intrinsic and extrinsic defects in graphene for potential applications. We also discuss the limitations and outlook for such defects in graphene.
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Affiliation(s)
| | - Heeju Kim
- Hybrid Materials Center, Sejong University Seoul 05006 Korea
- Department of Physics and Astronomy, Sejong University Seoul 05006 Korea
| | - Gunn Kim
- Hybrid Materials Center, Sejong University Seoul 05006 Korea
- Department of Physics and Astronomy, Sejong University Seoul 05006 Korea
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14
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Zagler G, Stecher M, Trentino A, Kraft F, Su C, Postl A, Längle M, Pesenhofer C, Mangler C, Åhlgren EH, Markevich A, Zettl A, Kotakoski J, Susi T, Mustonen K. Beam-driven Dynamics of Aluminium Dopants in Graphene. 2D MATERIALS 2022; 9:035009. [PMID: 35694040 PMCID: PMC9186522 DOI: 10.1088/2053-1583/ac6c30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Substituting heteroatoms into graphene can tune its properties for applications ranging from catalysis to spintronics. The further recent discovery that covalent impurities in graphene can be manipulated at atomic precision using a focused electron beam may open avenues towards sub-nanometer device architectures. However, the preparation of clean samples with a high density of dopants is still very challenging. Here, we report vacancy-mediated substitution of aluminium into laser-cleaned graphene, and without removal from our ultra-high vacuum apparatus, study their dynamics under 60 keV electron irradiation using aberration-corrected scanning transmission electron microscopy and spectroscopy. Three- and four-coordinated Al sites are identified, showing excellent agreement with ab initio predictions including binding energies and electron energy-loss spectrum simulations. We show that the direct exchange of carbon and aluminium atoms predicted earlier occurs under electron irradiation, although unexpectedly it is less probable than the same process for silicon. We also observe a previously unknown nitrogen-aluminium exchange that occurs at Al─N double-dopant sites at graphene divacancies created by our plasma treatment.
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Affiliation(s)
- Georg Zagler
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | - Maximilian Stecher
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | - Alberto Trentino
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | - Fabian Kraft
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | - Cong Su
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute at the University of California, Berkeley, CA 94720, USA
| | - Andreas Postl
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | - Manuel Längle
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | | | - Clemens Mangler
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | - E. Harriet Åhlgren
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | | | - Alex Zettl
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute at the University of California, Berkeley, CA 94720, USA
| | - Jani Kotakoski
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | - Toma Susi
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
| | - Kimmo Mustonen
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090, Austria
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15
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Srivastava S, Pal P, Sharma DK, Kumar S, Senguttuvan TD, Gupta BK. Ultrasensitive Boron-Nitrogen-Codoped CVD Graphene-Derived NO 2 Gas Sensor. ACS MATERIALS AU 2022; 2:356-366. [PMID: 36855380 PMCID: PMC9888635 DOI: 10.1021/acsmaterialsau.2c00003] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recent trends in 2D materials like graphene are focused on heteroatom doping in a hexagonal honeycomb lattice to tailor the desired properties for various lightweight atomic thin-layer derived portable devices, particularly in the field of gas sensors. To design such gas sensors, it is important to either discover new materials with enhanced properties or tailor the properties of existing materials via doping. Herein, we exploit the concept of codoping of heteroatoms in graphene for more improvements in gas sensing properties and demonstrate a boron- and nitrogen-codoped bilayer graphene-derived gas sensor for enhanced nitrogen dioxide (NO2) gas sensing applications, which may possibly be another alternative for an efficient sensing device. A well-known method of low-pressure chemical vapor deposition (LPCVD) is employed for synthesizing the boron- and nitrogen-codoped bilayer graphene (BNGr). To validate the successful synthesis of BNGr, the Raman, XPS, and FESEM characterization techniques were performed. The Raman spectroscopy results validate the synthesis of graphene nanosheets, and moreover, the FESEM and XPS characterization confirms the codoping of nitrogen and boron in the graphene matrix. The gas sensing device was fabricated on a Si/SiO2 substrate with prepatterned gold electrodes. The proposed BNGr sensor unveils an ultrasensitive nature for NO2 at room temperature. A plausible NO2 gas sensing mechanism is explored via a comparative study of the experimental results through the density functional theory (DFT) calculations of the adsorbed gas molecules on doped heteroatom sites. Henceforth, the obtained results of NO2 sensing with the BNGr gas sensor offer new prospects for designing next-generation lightweight and ultrasensitive gas sensing devices.
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Affiliation(s)
- Shubhda Srivastava
- CSIR-National
Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India,Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Prabir Pal
- Energy
Materials and Devices Division, CSIR-Central
Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata 700032, India,Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Durgesh Kumar Sharma
- Applied
Physics Department, Faculty of Engineering and Technology, M.J.P. Rohilkhand University, Bareilly 243006, India
| | - Sudhir Kumar
- Applied
Physics Department, Faculty of Engineering and Technology, M.J.P. Rohilkhand University, Bareilly 243006, India
| | - T. D. Senguttuvan
- CSIR-National
Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India,Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India,
| | - Bipin Kumar Gupta
- CSIR-National
Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India,Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India,
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16
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Luo W, Xiong W, Han Y, Yan X, Mai L. Application of two-dimensional layered materials in surface-enhanced Raman spectroscopy (SERS). Phys Chem Chem Phys 2022; 24:26398-26412. [DOI: 10.1039/d2cp03650a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
2D materials are promising SERS substrates. Seven feasible strategies to improve the SERS performance of 2D substrate materials are summarized. The prospect of future progress in SERS and possible challenges of 2D layered materials are put forwarded.
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Affiliation(s)
- Wen Luo
- Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, P. R. China
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Hubei University, Wuhan, 430062, P. R. China
| | - Weiwei Xiong
- Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, P. R. China
| | - Yuenan Han
- Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, P. R. China
| | - Xin Yan
- Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, P. R. China
| | - Liqiang Mai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 Hubei, China
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17
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Zhou Z, Deng J, Zhang X, Chen J, Liu J, Wang Z. Theoretical design of SnS 2-graphene heterojunctions with vacancy and impurity defects for multi-purpose photoelectric devices. Phys Chem Chem Phys 2021; 24:966-974. [PMID: 34914818 DOI: 10.1039/d1cp04552k] [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
SnS2 with atomic thickness has attracted extensive attention in the field of photocatalysis due to its special physicochemical properties, suitable band gap, low cost and low environmental toxicity. However, the application of SnS2 in the field of optoelectronics is restricted by its low photocatalytic efficiency and carrier mobility. In this study, vacancies and transition metal atoms are introduced into a SnS2 monolayer to modulate its physicochemical properties. Meanwhile, the SnS2 monolayer modified by vacancies and transition metal atoms is combined with graphene to form a heterostructure, which promotes the separation of photogenerated electron-hole pairs. The results of theoretical calculations show that the SnS2/graphene heterojunction can promote the separation of photogenerated carriers in intrinsic monolayer SnS2, and improve the photocatalytic efficiency and carrier mobility. The modification of Sn vacancies and Fe, Co atoms not only expands the visible light response range of the SnS2/graphene heterojunction, but also introduces magnetism, which is expected to be applied in spin optoelectronic materials. In this work, defects, doping and heterojunction assembly are rationally integrated, which provides a new idea for the design and development of spin optoelectronic devices based on monolayer SnS2.
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Affiliation(s)
- Zhonghao Zhou
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China.
| | - Jianjun Deng
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China.
| | - Xingchen Zhang
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China.
| | - Jinglong Chen
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China.
| | - Jia Liu
- No. 24 Research Institute, China Electronics Technology Group Corporation, Chongqing 401332, China
| | - Zhiyong Wang
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China.
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18
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19
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Khan F. N and S co-doped graphene enfolded Ni-Co-layered double hydroxides: an excellent electrode material for high-performance energy storage devices. RSC Adv 2021; 11:33895-33904. [PMID: 35497281 PMCID: PMC9042349 DOI: 10.1039/d1ra07235h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 10/07/2021] [Indexed: 01/08/2023] Open
Abstract
The performance of hybrid supercapacitors (HSCs) can be increased via the selection of higher capacitive electrode materials. Thus, layered double hydroxides (LDHs) have received extensive consideration in HSCs owing to their good ion-exchange properties, structural flexibility, and large specific surface area. Ni–Co-based LDHs show better specific capacitance, good synergy, and high-rate capability in aqueous electrolytes. However, LDHs suffer from low conductivity, which curbs the charge transfer and mass diffusion throughout the electrochemical process. Thus, the high performance of LDH-based supercapacitors is impeded. Hence, composites of LDH and conducting materials are used. Owing to its extraordinary conducting property, huge surface area, and cost-effectiveness, reduced graphene oxide (rGO) is used as conducting material for LDH-based composite electrodes. Moreover, via the incorporation of heteroatoms (N, S, etc.) into rGO, its electrochemical properties are further enhanced. Here, a novel composite electrode is prepared by wrapping Ni–Co-LDH with N and S-co-doped rGO (LDH-rGO-NS) via a hydrothermal process. The XPS C 1s spectra established the existence of N and S doping in the rGO. The electrochemical performance is enhanced due to an excellent ion/charge transfer rate because of N and S co-doping. The LDH-rGO-NS electrode offers a good charge transfer resistance of 0.24 Ω. The obtained anodic and cathodic b-values are 0.73 and 0.72, respectively. An admirable specific capacitance of 1388 F g−1 is accomplished at a sweep rate of 100 mV s−1. Furthermore, the obtained retention capacity is ∼71% after 2000 cycles. Moreover, the achieved specific capacitance is 2193 F g−1 at the discharge current density of 5 A g−1. The excellent electrochemical properties reveal the LDH-rGO-NS composites as encouraging electrode materials for HSCs. A novel graphene embedded Ni–Co-LDH electrode was developed. The charge transportation rate was enhanced via N and S heteroatom doping, which results in an excellent discharge capacitance of 2193 F g−1 at 5 A g−1.![]()
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Affiliation(s)
- Firoz Khan
- Interdisciplinary Research Center for Renewable Energy and Power Systems (IRC-REPS), Research Institute, King Fahd University of Petroleum & Minerals (KFUPM) Dhahran-31261 Saudi Arabia +966 13 8607312 +966 13 8607019
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20
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Hight-Huf N, Nagar Y, Levi A, Pagaduan JN, Datar A, Katsumata R, Emrick T, Ramasubramaniam A, Naveh D, Barnes MD. Polarization-Driven Asymmetric Electronic Response of Monolayer Graphene to Polymer Zwitterions Probed from Both Sides. ACS APPLIED MATERIALS & INTERFACES 2021; 13:47945-47953. [PMID: 34607423 DOI: 10.1021/acsami.1c13505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We investigated the nature of graphene surface doping by zwitterionic polymers and the implications of weak in-plane and strong through-plane screening using a novel sample geometry that allows direct access to either the graphene or the polymer side of a graphene/polymer interface. Using both Kelvin probe and electrostatic force microscopies, we observed a significant upshift in the Fermi level in graphene of ∼260 meV that was dominated by a change in polarizability rather than pure charge transfer with the organic overlayer. This physical picture is supported by density functional theory (DFT) calculations, which describe a redistribution of charge in graphene in response to the dipoles of the adsorbed zwitterionic moieties, analogous to a local DC Stark effect. Strong metallic-like screening of the adsorbed dipoles was observed by employing an inverted geometry, an effect identified by DFT to arise from a strongly asymmetric redistribution of charge confined to the side of graphene proximal to the zwitterion dipoles. Transport measurements confirm n-type doping with no significant impact on carrier mobility, thus demonstrating a route to desirable electronic properties in devices that combine graphene with lithographically patterned polymers.
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Affiliation(s)
- Nicholas Hight-Huf
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Yehiel Nagar
- Faculty of Engineering and Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Adi Levi
- Faculty of Engineering and Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - James Nicolas Pagaduan
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Avdhoot Datar
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Reika Katsumata
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Todd Emrick
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Ashwin Ramasubramaniam
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Doron Naveh
- Faculty of Engineering and Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Michael D Barnes
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, United States
- Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, United States
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21
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Bhattacharyya U, Pooventhiran T, Thomas R. Adsorption of the drug bempedoic acid over different 2D/3D nanosurfaces and enhancement of Raman activity enabling ultrasensitive detection: First principle analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 254:119630. [PMID: 33684853 DOI: 10.1016/j.saa.2021.119630] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 01/30/2021] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
The nanocluster-based drug delivery system is of much importance, now days. This manuscript studies the interaction of pristine/substituted/doped GQDs, fullerene, helicene and CNT with bempedoic acid, which is an effective alternative of statins in the treatment of hypercholesteremia. The adsorption energies are calculated at B3LYP-D3/6-311G+(2d,p) level in order to study the adsorption of bempedoic acid over the surfaces of the nanoclusters incorporating Grimme's dispersion correction. Surface enhanced Raman scattering (SERS), which is a sound approach to vibrational spectroscopy, is used in order to detect bempedoic acid. All the studies signify that bempedoic acid can be detected with these nanoclusters and the negative adsorption energies advocate for the possible use of these nanoclusters as effective drug delivery system in case of bempedoic acid. Adsorption energy of bempedoic acid over helicene was found to be the most negative among the mentioned nanocluster systems, while adsorption on the surface of CNT was found to be the least negative.
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Affiliation(s)
- Utsab Bhattacharyya
- Department of Chemistry, St Berchmans College (Autonomous), Mahatma Gandhi University, Changanassery, Kerala 686101, India
| | - T Pooventhiran
- Department of Chemistry, St Berchmans College (Autonomous), Mahatma Gandhi University, Changanassery, Kerala 686101, India
| | - Renjith Thomas
- Department of Chemistry, St Berchmans College (Autonomous), Mahatma Gandhi University, Changanassery, Kerala 686101, India.
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22
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Zhang XH, Liu SJ, Tian L, Wan Q, Hu AM, Li XF. Rectification with controllable directions in sulfur-doped armchair graphene nanoribbon heterojunctions. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Pham TT, Pham TN, Chihaia V, Vu QA, Trinh TT, Pham TT, Van Thang L, Son DN. How do the doping concentrations of N and B in graphene modify the water adsorption? RSC Adv 2021; 11:19560-19568. [PMID: 35479230 PMCID: PMC9033564 DOI: 10.1039/d1ra01506k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 05/14/2021] [Indexed: 12/17/2022] Open
Abstract
Understanding the interaction of water and graphene is crucial for various applications such as water purification, desalination, and electrocatalysis. Experimental and theoretical studies have already investigated water adsorption on N- and B-doped graphene. However, there are no reports available that elucidate the influences of the N and B doping content in graphene on the microscopic geometrical structure and the electronic properties of the adsorbed water. Thus, this work is devoted to solving this problem using self-consistent van der Waals density functional theory calculations. The N and B doping contents of 0.0, 3.1, 6.3, and 9.4% were considered. The results showed that the binding energy of water increases almost linearly as a function of doping content at all concentrations for N-doped graphene but below 6.3% for B-doped graphene. In the linear range, the binding energy increases by approximately 30 meV for each increment of the doping ratio. Analyses of the geometric and electronic structures explained the enhancement of the water-graphene interaction with the variation in doping percentage.
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Affiliation(s)
- Thi Tan Pham
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Thanh Ngoc Pham
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Viorel Chihaia
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy Splaiul Independentei 202, Sector 6 060021 Bucharest Romania
| | - Quang Anh Vu
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Thuat T Trinh
- Department of Civil and Environmental Engineering, Norwegian University of Science and Technology NO-7491 Trondheim Norway
| | - Trung Thanh Pham
- Namur Institute of Structured Matter (NISM), Department of Physics, University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium
| | - Le Van Thang
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Do Ngoc Son
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
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24
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Yoo H, Heo K, Ansari MHR, Cho S. Recent Advances in Electrical Doping of 2D Semiconductor Materials: Methods, Analyses, and Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:832. [PMID: 33805062 PMCID: PMC8064109 DOI: 10.3390/nano11040832] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 12/22/2022]
Abstract
Two-dimensional materials have garnered interest from the perspectives of physics, materials, and applied electronics owing to their outstanding physical and chemical properties. Advances in exfoliation and synthesis technologies have enabled preparation and electrical characterization of various atomically thin films of semiconductor transition metal dichalcogenides (TMDs). Their two-dimensional structures and electromagnetic spectra coupled to bandgaps in the visible region indicate their suitability for digital electronics and optoelectronics. To further expand the potential applications of these two-dimensional semiconductor materials, technologies capable of precisely controlling the electrical properties of the material are essential. Doping has been traditionally used to effectively change the electrical and electronic properties of materials through relatively simple processes. To change the electrical properties, substances that can donate or remove electrons are added. Doping of atomically thin two-dimensional semiconductor materials is similar to that used for silicon but has a slightly different mechanism. Three main methods with different characteristics and slightly different principles are generally used. This review presents an overview of various advanced doping techniques based on the substitutional, chemical, and charge transfer molecular doping strategies of graphene and TMDs, which are the representative 2D semiconductor materials.
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Affiliation(s)
- Hocheon Yoo
- Department of Electronic Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea; (H.Y.); (M.H.R.A.)
- Graduate School of IT Convergence Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea
| | - Keun Heo
- Department of Semiconductor Science & Technology, Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, Korea;
| | - Md. Hasan Raza Ansari
- Department of Electronic Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea; (H.Y.); (M.H.R.A.)
- Graduate School of IT Convergence Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea
| | - Seongjae Cho
- Department of Electronic Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea; (H.Y.); (M.H.R.A.)
- Graduate School of IT Convergence Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea
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25
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Rangel-Cortes E, Pescador-Rojas JA, Cardozo-Mata VA, Hernández-Hernández A, Vallejo-Castañeda E, Hernández-Hernández LA, Romero-Cortes T. Cycloaddition between nitrogen-doped graphene (6π-component) and benzene (4π-component): a theoretical approach using density functional theory with vdW-DF correction. Phys Chem Chem Phys 2021; 23:5870-5877. [PMID: 33659971 DOI: 10.1039/d0cp06082h] [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 interaction between nitrogen-doped graphene defects (N3V1 and N4V2 pyridinic, and N3V1 and N3V3 pyrrolic) and benzene have been investigated by applying density functional theory (DFT), together with the vdW-DF correction. We discovered that only the N3V3 pyrrolic defect is a reactive site (6π-component), forming a cycloadduct with benzene (4π-component) that has energy barriers below 154.38 kJ mol-1 (1.60 eV). The conduction and valence bands (HOMO and LUMO) for N3V3 form a degenerate pair of orbitals at the gamma point, with the same ionization potential (IP) and electron affinity (EA). Likewise, inspection of the orbital symmetries for both systems confirms that these must undergo concerted reactions based on the Woodward and Hoffmann principles of orbital symmetry, with the appropriate orbital occupancies. This is the first time that substitutionally doped graphene has been demonstrated to participate as a 6π-component for cycloaddition reactions with benzene.
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Affiliation(s)
- E Rangel-Cortes
- Escuela Superior Apan, Universidad Autónoma del Estado de Hidalgo. Carretera Apan-Capulalpan s/n, Colonia, 43920 Chimalpa Tlalayote, Hgo, Mexico.
| | - J A Pescador-Rojas
- Escuela Superior Apan, Universidad Autónoma del Estado de Hidalgo. Carretera Apan-Capulalpan s/n, Colonia, 43920 Chimalpa Tlalayote, Hgo, Mexico.
| | - V A Cardozo-Mata
- Escuela Superior Apan, Universidad Autónoma del Estado de Hidalgo. Carretera Apan-Capulalpan s/n, Colonia, 43920 Chimalpa Tlalayote, Hgo, Mexico.
| | - A Hernández-Hernández
- Escuela Superior Apan, Universidad Autónoma del Estado de Hidalgo. Carretera Apan-Capulalpan s/n, Colonia, 43920 Chimalpa Tlalayote, Hgo, Mexico.
| | - E Vallejo-Castañeda
- Escuela Superior Apan, Universidad Autónoma del Estado de Hidalgo. Carretera Apan-Capulalpan s/n, Colonia, 43920 Chimalpa Tlalayote, Hgo, Mexico.
| | - L A Hernández-Hernández
- Escuela Superior Apan, Universidad Autónoma del Estado de Hidalgo. Carretera Apan-Capulalpan s/n, Colonia, 43920 Chimalpa Tlalayote, Hgo, Mexico.
| | - T Romero-Cortes
- Escuela Superior Apan, Universidad Autónoma del Estado de Hidalgo. Carretera Apan-Capulalpan s/n, Colonia, 43920 Chimalpa Tlalayote, Hgo, Mexico.
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26
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Cruz-Martínez H, Rojas-Chávez H, Montejo-Alvaro F, Peña-Castañeda YA, Matadamas-Ortiz PT, Medina DI. Recent Developments in Graphene-Based Toxic Gas Sensors: A Theoretical Overview. SENSORS (BASEL, SWITZERLAND) 2021; 21:1992. [PMID: 33799914 PMCID: PMC8001952 DOI: 10.3390/s21061992] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/18/2021] [Accepted: 02/22/2021] [Indexed: 12/18/2022]
Abstract
Detecting and monitoring air-polluting gases such as carbon monoxide (CO), nitrogen oxides (NOx), and sulfur oxides (SOx) are critical, as these gases are toxic and harm the ecosystem and the human health. Therefore, it is necessary to design high-performance gas sensors for toxic gas detection. In this sense, graphene-based materials are promising for use as toxic gas sensors. In addition to experimental investigations, first-principle methods have enabled graphene-based sensor design to progress by leaps and bounds. This review presents a detailed analysis of graphene-based toxic gas sensors by using first-principle methods. The modifications made to graphene, such as decorated, defective, and doped to improve the detection of NOx, SOx, and CO toxic gases are revised and analyzed. In general, graphene decorated with transition metals, defective graphene, and doped graphene have a higher sensibility toward the toxic gases than pristine graphene. This review shows the relevance of using first-principle studies for the design of novel and efficient toxic gas sensors. The theoretical results obtained to date can greatly help experimental groups to design novel and efficient graphene-based toxic gas sensors.
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Affiliation(s)
- Heriberto Cruz-Martínez
- Tecnológico Nacional de México, Instituto Tecnológico del Valle de Etla, Abasolo S/N, Barrio del Agua Buena, Santiago Suchilquitongo, Oaxaca 68230, Mexico; (H.C.-M.); (F.M.-A.)
| | - Hugo Rojas-Chávez
- Tecnológico Nacional de México, Instituto Tecnológico de Tláhuac II, Camino Real 625, Tláhuac, Ciudad de México 13508, Mexico;
| | - Fernando Montejo-Alvaro
- Tecnológico Nacional de México, Instituto Tecnológico del Valle de Etla, Abasolo S/N, Barrio del Agua Buena, Santiago Suchilquitongo, Oaxaca 68230, Mexico; (H.C.-M.); (F.M.-A.)
| | - Yesica A. Peña-Castañeda
- Colegio de Ciencia y Tecnología, Universidad Autónoma de la Ciudad de México, Av. Fray Servando Teresa de Mier 92, Cuauhtémoc, Ciudad de México 06080, Mexico;
| | - Pastor T. Matadamas-Ortiz
- Instituto Politécnico Nacional, CIIDIR-OAXACA, Hornos No. 1003, Noche Buena, Santa Cruz Xoxocotlán 71230, Mexico
| | - Dora I. Medina
- Tecnologico de Monterrey, School of Engineering and Sciences, Atizapan de Zaragoza, Estado de México 52926, Mexico
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27
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Romero MP, Buzza HH, Stringasci MD, Estevão BM, Silva CCC, Pereira-da-Silva MA, Inada NM, Bagnato VS. Graphene Oxide Theranostic Effect: Conjugation of Photothermal and Photodynamic Therapies Based on an in vivo Demonstration. Int J Nanomedicine 2021; 16:1601-1616. [PMID: 33688181 PMCID: PMC7935354 DOI: 10.2147/ijn.s287415] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 01/14/2021] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION Cancer is the second leading cause of death globally and is responsible, where about 1 in 6 deaths in the world. Therefore, there is a need to develop effective antitumor agents that are targeted only to the specific site of the tumor to improve the efficiency of cancer diagnosis and treatment and, consequently, limit the unwanted systemic side effects currently obtained by the use of chemotherapeutic agents. In this context, due to its unique physical and chemical properties of graphene oxide (GO), it has attracted interest in biomedicine for cancer therapy. METHODS In this study, we report the in vivo application of nanocomposites based on Graphene Oxide (nc-GO) with surface modified with PEG-folic acid, Rhodamine B and Indocyanine Green. In addition to displaying red fluorescence spectra Rhodamine B as the fluorescent label), in vivo experiments were performed using nc-GO to apply Photodynamic Therapy (PDT) and Photothermal Therapy (PTT) in the treatment of Ehrlich tumors in mice using NIR light (808 nm 1.8 W/cm2). RESULTS This study based on fluorescence images was performed in the tumor in order to obtain the highest concentration of nc-GO in the tumor as a function of time (time after intraperitoneal injection). The time obtained was used for the efficient treatment of the tumor by PDT/PTT. DISCUSSION The current study shows an example of successful using nc-GO nanocomposites as a theranostic nanomedicine to perform simultaneously in vivo fluorescence diagnostic as well as combined PDT-PTT effects for cancer treatments.
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Affiliation(s)
- Maria P Romero
- São Carlos Institute of Physics, IFSC/USP, São Carlos, São Paulo, Brazil
- Departamento de Materiales, Facultad de Ingeniería Mecánica, Escuela Politécnica Nacional, Quito, Ecuador
| | - Hilde H Buzza
- São Carlos Institute of Physics, IFSC/USP, São Carlos, São Paulo, Brazil
| | | | - Bianca M Estevão
- São Carlos Institute of Physics, IFSC/USP, São Carlos, São Paulo, Brazil
| | - Cecilia C C Silva
- MackGraphe, Mackenzie Presbyterian University, São Paulo, São Paulo, Brazil
| | | | - Natalia M Inada
- São Carlos Institute of Physics, IFSC/USP, São Carlos, São Paulo, Brazil
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28
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Almuqrin AH, Al-Otaibi JS, Mary YS, Mary YS. DFT computational study towards investigating psychotropic drugs, promazine and trifluoperazine adsorption on graphene, fullerene and carbon cyclic ring nanoclusters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:119012. [PMID: 33039847 DOI: 10.1016/j.saa.2020.119012] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/05/2020] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
Abstract
Detection and qualification process related to impurities assume importance in pharmacological drug development programmes and the present article gives the structural and spectral characterisation of phenothiazine derivatives, promazine (PME) and trifluoperazine (TPE) and their self-assembly with graphene/fullerene/carbon ring (CG/CF/CR) systems theoretically. The investigation of adsorption behaviour of these compounds can provide valuable information about its reactivity, electronic and structural properties. Three-dimensional electrostatic potential diagrams were mapped. The frontier orbital energies and energy band gaps of the molecules were computed. Delocalization of charge density between the bonding or lone pair and antibonding orbitals is calculated by NBO analysis. Docking was executed to investigate binding areas of chemical compounds. Bioactivity scores show that the pharmacokinetic and pharmacological properties of the ligands are appropriate leading to be considered potential drug agents. The obtained theoretical wavenumber results of the present study were fully compatible with the experimental results.
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Affiliation(s)
- Aljawhara H Almuqrin
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Saudi Arabia
| | - Jamelah S Al-Otaibi
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Saudi Arabia
| | - Y Sheena Mary
- Department of Physics, Fatima Mata National College (Autonomous), Kollam, Kerala, India.
| | - Y Shyma Mary
- Department of Physics, Fatima Mata National College (Autonomous), Kollam, Kerala, India
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29
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Korivand M, Zamani M. Surface modification of graphene by coupling with electron deficient radicals. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121851] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Chen T, An L, Jia X. A DFT-based analysis of adsorption properties of fluoride anion on intrinsic, B-doped, and Al-doped graphene. J Mol Model 2021; 27:56. [PMID: 33515078 DOI: 10.1007/s00894-021-04683-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 01/19/2021] [Indexed: 11/29/2022]
Abstract
Fluorine emission from domestic wastewater is a major cause of severe environmental issues. In this paper, the density functional theory has been used to reveal the adsorption properties of F- ions and HF molecules on intrinsic graphene, B-doped graphene, and Al-doped graphene. Throughout the analysis of band structure, geometric structure, adsorption energy, charge transfer, charge density, density of states, and frontier orbital, we can find that the adsorption of F- ions and HF molecules on intrinsic graphene and HF molecules on B-doped graphene is weak, and it is only physical adsorption. When F- ions and HF molecules are adsorbed on Al-doped graphene and F- ions adsorbed on B-doped graphene, the adsorption energy, charge transfer, and charge density greatly increase, and the adsorption distance significantly decreases, and there exist obvious hybridizations by analyzing the charge density and density of states. We can also find that Al-doped graphene is more sensitive to F- ions after comparing the variation of band gap. The work conducted in this research provides a theoretical guidance for the application of fluorine sensors based on graphene.
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Affiliation(s)
- Tao Chen
- College of Mechanical Engineering, North China University of Science and Technology, Tangshan, 063210, China
| | - Libao An
- College of Mechanical Engineering, North China University of Science and Technology, Tangshan, 063210, China.
| | - Xiaotong Jia
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
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31
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Al-Otaibi JS, Almuqrin AH, Sheena Mary Y, Shyma Mary Y. Utilization of O/S-doped graphene nanoclusters for ultrasensitive detection of flurane derivatives-DFT investigations. J Biomol Struct Dyn 2021; 40:5320-5327. [PMID: 33410367 DOI: 10.1080/07391102.2020.1870155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Nanocluster based drug delivery systems are very useful in modern medical treatment and interaction mechanism of desflurane (DES), isoflurane ISO), sevoflurane (SEV) over carboxyl substituted graphene-doped with O and S atoms were investigated in the present study. Different electronic and chemical properties of adsorbed desflurane, isoflurane and sevoflurane with nanoclusters are analyzed. To track the drugs, SERS is used as an efficient method and drug's detection was analyzed using SERS. DES's energy over GQD-S is greater than that over GQD-O nanocluster and for ISO and SEV, adsorption energies over the O/S nanoclusters are same. The title drugs work on the reactives sites and got adsorbed. For ISO, there is an increase in fluorine atom charges and for DES and SEV, the fluorine atom charge decreases due to adsorption in both O/S nanoclusters. Changes in chemical descriptors are identified for the sensing property of drug-nanoclusters.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Jamelah S Al-Otaibi
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Saudi Arabia
| | - Aljawhara H Almuqrin
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Saudi Arabia
| | - Y Sheena Mary
- Researcher, Thushara, Neethinagar, Kollam, Kerala, India
| | - Y Shyma Mary
- Researcher, Thushara, Neethinagar, Kollam, Kerala, India
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32
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Mary YS, Mary YS. Utilization of doped/undoped graphene quantum dots for ultrasensitive detection of duphaston, a SERS platform. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 244:118865. [PMID: 32889339 DOI: 10.1016/j.saa.2020.118865] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 06/11/2023]
Abstract
Recently nanocluster based drug delivery systems have become the most skillful to study. Interaction mechanism of duphaston (DPH) over graphene (G), carboxyl substituted graphene (COG) and doped COG-X (X = O/S/N/B) were investigated. We studied different spectroscopic properties of adsorbed DPH with nanoclusters. To study effect adsorption of DPH with nanoclusters, the adsorption energies were measured. To track DPH, surface enhanced Raman scattering is used since it is an efficient approach to vibrational spectroscopy. The DPH detection was investigated using GQDs SERS property. For the adsorption of DPH with COG-B nanocluster maximum energy interaction is determined. DPH works on the electrophilic site of nanoclusters as donor of electrons and adsorbs. Charge transfer is higher for to COG-B nanocluster than for other nanoclusters. Variations in chemical descriptors are also noted to understand sensing property of DPH molecule-nanoclusters. The analysis of different properties demonstrates enhancement effect which makes it significant in detecting DPH in other products.
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Affiliation(s)
- Y Sheena Mary
- Department of Physics, Fatima Mata National College (Autonomous), Kollam, Kerala, India.
| | - Y Shyma Mary
- Department of Physics, Fatima Mata National College (Autonomous), Kollam, Kerala, India
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Li W, Zhang S, Chen Q, Zhong Q. Tailorable boron-doped carbon nanotubes as high-efficiency counter electrodes for quantum dot sensitized solar cells. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02266g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
1. Tunable BCNTs are prepared by the pre-oxidation strategy. 2. B-Doped CNTs exhibit excellent activity for Sn2− reduction. 3. The QDSSC based on CdS/CdSe QDs and BCNT1 shows a PCE of 4.55% under one sunlight illumination.
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Affiliation(s)
- Wenhua Li
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Shule Zhang
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Qianqiao Chen
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Qin Zhong
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
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Ruiz del Árbol N, Sánchez‐Sánchez C, Otero‐Irurueta G, Martínez JI, de Andrés PL, Gómez‐Herrero AC, Merino P, Piantek M, Serrate D, Lacovig P, Lizzit S, Alemán J, Ellis GJ, López MF, Martín‐Gago JA. On-Surface Driven Formal Michael Addition Produces m-Polyaniline Oligomers on Pt(111). Angew Chem Int Ed Engl 2020; 59:23220-23227. [PMID: 32761699 PMCID: PMC7116460 DOI: 10.1002/anie.202009863] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Indexed: 11/08/2022]
Abstract
On-surface synthesis is emerging as a highly rational bottom-up methodology for the synthesis of molecular structures that are unattainable or complex to obtain by wet chemistry. Here, oligomers of meta-polyaniline, a known ferromagnetic polymer, were synthesized from para-aminophenol building-blocks via an unexpected and highly specific on-surface formal 1,4 Michael-type addition at the meta position, driven by the reduction of the aminophenol molecule. We rationalize this dehydrogenation and coupling reaction mechanism with a combination of in situ scanning tunneling and non-contact atomic force microscopies, high-resolution synchrotron-based X-ray photoemission spectroscopy and first-principles calculations. This study demonstrates the capability of surfaces to selectively modify local molecular conditions to redirect well-established synthetic routes, such as Michael coupling, towards the rational synthesis of new covalent nanostructures.
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Affiliation(s)
- Nerea Ruiz del Árbol
- ESISNA Group, Materials Science FactoryInstitute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Carlos Sánchez‐Sánchez
- ESISNA Group, Materials Science FactoryInstitute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Gonzalo Otero‐Irurueta
- Centre for Mechanical Technology and Automation (TEMA)University of Aveiro3810-193AveiroPortugal
| | - José I. Martínez
- ESISNA Group, Materials Science FactoryInstitute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Pedro L. de Andrés
- ESISNA Group, Materials Science FactoryInstitute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Ana C. Gómez‐Herrero
- ESISNA Group, Materials Science FactoryInstitute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Pablo Merino
- ESISNA Group, Materials Science FactoryInstitute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Marten Piantek
- Instituto de Ciencia de Materiales de AragónCSIC-Universidad de Zaragoza50009ZaragozaSpain
| | - David Serrate
- Instituto de Ciencia de Materiales de AragónCSIC-Universidad de Zaragoza50009ZaragozaSpain
| | - Paolo Lacovig
- Elettra—Sincrotrone Trieste S.C.p.A.Strada Statale 14 km 163.534149TriesteItaly
| | - Silvano Lizzit
- Elettra—Sincrotrone Trieste S.C.p.A.Strada Statale 14 km 163.534149TriesteItaly
| | - José Alemán
- Organic Chemistry Department, Módulo 1Universidad Autónoma de Madrid28049MadridSpain
| | - Gary J. Ellis
- Polymer Physics GroupInstitute of Polymer Science and Technology (ICTP-CSIC)Juan de la Cierva 328006MadridSpain
| | - María F. López
- ESISNA Group, Materials Science FactoryInstitute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - José A. Martín‐Gago
- ESISNA Group, Materials Science FactoryInstitute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
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35
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Ruiz del Árbol N, Sánchez‐Sánchez C, Otero‐Irurueta G, Martínez JI, Andrés PL, Gómez‐Herrero AC, Merino P, Piantek M, Serrate D, Lacovig P, Lizzit S, Alemán J, Ellis GJ, López MF, Martín‐Gago JA. On‐Surface Driven Formal Michael Addition Produces
m
‐Polyaniline Oligomers on Pt(111). Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nerea Ruiz del Árbol
- ESISNA Group, Materials Science Factory Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Carlos Sánchez‐Sánchez
- ESISNA Group, Materials Science Factory Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Gonzalo Otero‐Irurueta
- Centre for Mechanical Technology and Automation (TEMA) University of Aveiro 3810-193 Aveiro Portugal
| | - José I. Martínez
- ESISNA Group, Materials Science Factory Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Pedro L. Andrés
- ESISNA Group, Materials Science Factory Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Ana C. Gómez‐Herrero
- ESISNA Group, Materials Science Factory Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Pablo Merino
- ESISNA Group, Materials Science Factory Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Marten Piantek
- Instituto de Ciencia de Materiales de Aragón CSIC-Universidad de Zaragoza 50009 Zaragoza Spain
| | - David Serrate
- Instituto de Ciencia de Materiales de Aragón CSIC-Universidad de Zaragoza 50009 Zaragoza Spain
| | - Paolo Lacovig
- Elettra—Sincrotrone Trieste S.C.p.A. Strada Statale 14 km 163.5 34149 Trieste Italy
| | - Silvano Lizzit
- Elettra—Sincrotrone Trieste S.C.p.A. Strada Statale 14 km 163.5 34149 Trieste Italy
| | - José Alemán
- Organic Chemistry Department, Módulo 1 Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Gary J. Ellis
- Polymer Physics Group Institute of Polymer Science and Technology (ICTP-CSIC) Juan de la Cierva 3 28006 Madrid Spain
| | - María F. López
- ESISNA Group, Materials Science Factory Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - José A. Martín‐Gago
- ESISNA Group, Materials Science Factory Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
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36
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Computational Investigations of Dispersion Interactions between Small Molecules and Graphene-like Flakes. J Phys Chem A 2020; 124:9552-9561. [PMID: 33166136 DOI: 10.1021/acs.jpca.0c06595] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigate dispersion interactions in a selection of atomic, molecular, and molecule-surface systems, comparing high-level correlated methods with empirically corrected density functional theory (DFT). We assess the efficacy of functionals commonly used for surface-based calculations, with and without the D3 correction of Grimme. We find that the inclusion of the correction is essential to get meaningful results, but there is otherwise little to distinguish between the functionals. We also present coupled-cluster quality interaction curves for H2, NO2, H2O, and Ar interacting with large carbon flakes, acting as models for graphene surfaces, using novel absolutely localized molecular orbital based methods. These calculations demonstrate that the problems with empirically corrected DFT when investigating dispersion appear to compound as the system size increases, with important implications for future computational studies of molecule-surface interactions.
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37
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Moreno-López JC, Fedi F, Argentero G, Carini M, Chimborazo J, Meyer J, Pichler T, Mateo-Alonso A, Ayala P. Exclusive Substitutional Nitrogen Doping on Graphene Decoupled from an Insulating Substrate. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2020; 124:22150-22157. [PMID: 33072238 PMCID: PMC7552092 DOI: 10.1021/acs.jpcc.0c06415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/31/2020] [Indexed: 06/01/2023]
Abstract
The on-surface synthesis of atomically flat N-doped graphene on oxidized copper is presented. Besides circumventing the almost standard use of metallic substrates for growth, this method allows producing graphene with ∼2.0 at % N in a substitutional configuration directly decoupled from the substrate. Angle-resolved photoemission shows a linear energy-momentum dispersion where the Dirac point lies at the Fermi level. Additionally, the N functional centers can be selectively tailored in sp2 substitutional configuration by making use of a purpose-made molecular precursor: dicyanopyrazophenanthroline (C16H6N6).
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Affiliation(s)
| | - Filippo Fedi
- Faculty
of Physics, University of Vienna, 1090 Wien, Austria
| | | | - Marco Carini
- POLYMAT,
University of the Basque Country UPV/EHU, Avenida de Tolosa 72, E-20018 Donostia-San Sebastian, Spain
| | | | - Jannik Meyer
- Faculty
of Physics, University of Vienna, 1090 Wien, Austria
| | - Thomas Pichler
- Faculty
of Physics, University of Vienna, 1090 Wien, Austria
| | - Aurelio Mateo-Alonso
- Faculty
of Physics, University of Vienna, 1090 Wien, Austria
- Ikerbasque,
Basque Foundation for Science, 48013 Bilbao, Spain
| | - Paola Ayala
- Faculty
of Physics, University of Vienna, 1090 Wien, Austria
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38
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Kumar VS, Mary YS, Pradhan K, Brahman D, Mary YS, Serdaroğlu G, Rad AS, Roxy M. Conformational analysis and quantum descriptors of two new imidazole derivatives by experimental, DFT, AIM, molecular docking studies and adsorption activity on graphene. Heliyon 2020; 6:e05182. [PMID: 33072922 PMCID: PMC7548447 DOI: 10.1016/j.heliyon.2020.e05182] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/29/2020] [Accepted: 10/02/2020] [Indexed: 11/15/2022] Open
Abstract
1-[2-(2-hydroxy-3-methoxy-5-(4-methoxyphenylazo)benzaldeneamino)ethyl]-3-methyl-3H-imidazole (HMY) and 1-[2-(2-hydroxy-3-methoxy-5-(4-methylphenylazo)benzaldene amino)ethyl]-3-methyl-3H-imidazole (HMM) were synthesized and characterized using spectral analysis. Conformational analysis has been achieved using potential energy scan for different rotable bonds for obtaining the lowest energy conformer. Conformer with minimum energy is obtained along the dihedral angle N30-C31-C34-N37. QTAIM analysis gives nature and strength of hydrogen bonding interactions. UV-Vis, electrostatic potential and chemical descriptors are analyzed. Interaction of HMY and HMM with graphene is analyzed in terms of SERS activity. Chemical reactivity descriptors were investigated for graphene-drug systems. NLO activity of parent drugs and its graphene complexes show good activity. The wavenumber downshift of different modes is noted. Title molecules exhibit inhibitory activity against cytochrome C peroxidase. Interactions with graphene sheets are theoretically predicted for the title compounds.
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Affiliation(s)
- Veena S. Kumar
- Department of Physics, SN College, Kollam, Research Centre, University of Kerala, Kerala, India
| | - Y. Sheena Mary
- Department of Physics, Fatima Mata National College(Autonomous), Kollam, Kerala, India
| | - Kiran Pradhan
- Department of Chemistry, St. Joseph's College, P.O. North Point, Dist. Darjeeling 734104, India
| | - Dhiraj Brahman
- Department of Chemistry, St. Joseph's College, P.O. North Point, Dist. Darjeeling 734104, India
| | - Y. Shyma Mary
- Department of Physics, Fatima Mata National College(Autonomous), Kollam, Kerala, India
| | - Goncagül Serdaroğlu
- Sivas Cumhuriyet University, Faculty of Education, Math. and Sci. Edu., 58140 Sivas TURKEY
| | - Ali Shokuhi Rad
- Department of Chemical Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran
| | - M.S. Roxy
- Department of Physics, SN College, Kollam, Research Centre, University of Kerala, Kerala, India
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39
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Zou X, Lou S, Yang C, Liu N, Wang X, Shi L, Meng X. Catalytic Oxidation of NO on N-doped Carbon Materials at Low Temperature. Catal Letters 2020. [DOI: 10.1007/s10562-020-03297-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Ida S, Wilson P, Neppolian B, Sathish M, Mahammed Shaheer AR, Ravi P. Tuning the type of nitrogen on N-RGO supported on N-TiO 2 under ultrasonication/hydrothermal treatment for efficient hydrogen evolution - A mechanistic overview. ULTRASONICS SONOCHEMISTRY 2020; 64:104866. [PMID: 31983561 DOI: 10.1016/j.ultsonch.2019.104866] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/04/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
Efficient hydrogen production through water splitting has been the challenging task to be achieved in the present context of energy crisis. Among the various catalysts employed, nitrogen doped Titanium dioxide/Reduced graphene oxide (N-TiO2/RGO) nanocomposite has been established to be a promising photocatalytic material for this purpose. However, nuances of doping nitrogen on TiO2 and the type of nitrogen (pyridinic, pyrrolic and graphitic) stabilized on RGO responsible for facilitating the H2 production has not yet been addressed mechanistically. In the present investigation, an attempt has been made to synthesise N-Titanium dioxide/N-Reduced graphene oxide (NTNG) nanocomposite under ultrasonication followed by hydrothermal treatment. A stainlesssteel ultrasonic bath, of 6.5 L tank size (LxBxH) 300 × 150 × 150 mm, was used for ultrasonic treatments. The transducers located at the bottom of the ultrasonic bath generate a frequency of 40 kHz with maximum power of 200 W. A mechanism has been proposed including the nuances of formation and the stabilisation of each type of nitrogen on N-RGO as a function of ultrasonication time. The present work supports the stabilization of a given type of nitrogen on RGO through keto enol tautomerism. XPS and FTIR studies have been undertaken to identify the different types of nitrogen doping and the presence of functional groups respectively. XRD, UV-Vis DRS and PL investigations have been made to establish morphological profile and band gap structure of the nanocomposite. It was observed that pyrrolic type nitrogen stabilized on N-RGO augments the efficiency of photocatalytic activity through hydrogen production by water splitting.
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Affiliation(s)
- S Ida
- Department of Chemistry, Madras Christian College (Autonomous), University of Madras, Chennai 600005, Tamil Nadu, India
| | - P Wilson
- Department of Chemistry, Madras Christian College (Autonomous), University of Madras, Chennai 600005, Tamil Nadu, India.
| | - B Neppolian
- SRM Research Institute, SRM University, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | - M Sathish
- Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamilnadu, India
| | - A R Mahammed Shaheer
- SRM Research Institute, SRM University, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | - P Ravi
- Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamilnadu, India
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Dey A, Ghosh P, Bowen J, Braithwaite NSJ, Krishnamurthy S. Engineering work function of graphene oxide from p to n type using a low power atmospheric pressure plasma jet. Phys Chem Chem Phys 2020; 22:7685-7698. [PMID: 32031552 DOI: 10.1039/c9cp06174f] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we demonstrate doping graphene oxide (GO) films using a low power atmospheric pressure plasma jet (APPJ) with subsequent tuning of the work function. The surface potential of the plasma functionalized GO films could be tuned by 120 ± 10 mV by varying plasma parameters. X-ray spectroscopy used to probe these changes in electronic structure of systematically functionalized GO films by plasma. Detailed investigation using X-ray photoelectron spectroscopy and near edge X-ray absorption fine structure spectroscopy revealed the reactive nitrogen species in the plasma induce finite changes in the surface chemistry of the GO films, introducing additional density of states near the top of the valence band edge. Nitrogen introduced by the atmospheric pressure plasma is predominantly in a graphitic configuration with a varying concentration of pyridinic nitrogen. Additionally, evidence of gradual de-epoxidation of these GO films with increasing plasma exposure was also observed. We attribute this variation in work function values to the configuration of nitrogen in the graphitic structure as revealed by X-ray spectroscopy. With pyridinic nitrogen the electronic states of GO became electron deficient, inducing a p-type doping whereas an increase in graphitic nitrogen increased the electron density of GO leading to an n-type doping effect. Nitrogen doping was also found to decrease the resistivity from 138 MΩ sq-1 to 4 MΩ sq-1. These findings are extremely useful in fabricating heterojunction devices like sensors and optoelectronic devices where band structure alignment is key to device performance when GO is used as a charge transport layer. This technique can be extended to other known 2D systems.
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Affiliation(s)
- Avishek Dey
- School of Engineering and Innovation, The Open University, Milton Keynes, MK7 6AA, UK.
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Zhang J, Zhang H, Cheng MJ, Lu Q. Tailoring the Electrochemical Production of H 2 O 2 : Strategies for the Rational Design of High-Performance Electrocatalysts. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1902845. [PMID: 31539208 DOI: 10.1002/smll.201902845] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/30/2019] [Indexed: 06/10/2023]
Abstract
The production of H2 O2 via the electrochemical oxygen reduction reaction (ORR) presents an attractive decentralized alternative to the current industry-dominant anthraquinone process. However, in order to achieve viable commercialization of this process, a state-of-the-art electrocatalyst exhibiting high activity, selectivity, and long-term stability is imperative for industrial applications. Herein, an in-depth discussion on the current frontiers in electrocatalyst design is provided, emphasizing the influences of electronic and geometric effects, surface structure, and the effects of heteroatom functionalization on the catalytic performance of commonly studied materials (metals, alloys, carbons). The limitations on the performance of the current catalyst materials are also discussed, together with alternative strategies to overcome the impediments. Finally, directions of future research efforts for the discovery of next-generation ORR electrocatalysts are highlighted.
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Affiliation(s)
- Jiayi Zhang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Haochen Zhang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Mu-Jeng Cheng
- Department of Chemistry, National Cheng Kung University, Tainan, 701, Taiwan
| | - Qi Lu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
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43
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Electronic Structure of Nitrogen- and Phosphorus-Doped Graphenes Grown by Chemical Vapor Deposition Method. MATERIALS 2020; 13:ma13051173. [PMID: 32155705 PMCID: PMC7085186 DOI: 10.3390/ma13051173] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 01/14/2023]
Abstract
Heteroatom doping is a widely used method for the modification of the electronic and chemical properties of graphene. A low-pressure chemical vapor deposition technique (CVD) is used here to grow pure, nitrogen-doped and phosphorous-doped few-layer graphene films from methane, acetonitrile and methane-phosphine mixture, respectively. The electronic structure of the films transferred onto SiO2/Si wafers by wet etching of copper substrates is studied by X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy using a synchrotron radiation source. Annealing in an ultra-high vacuum at ca. 773 K allows for the removal of impurities formed on the surface of films during the synthesis and transfer procedure and changes the chemical state of nitrogen in nitrogen-doped graphene. Core level XPS spectra detect a low n-type doping of graphene film when nitrogen or phosphorous atoms are incorporated in the lattice. The electrical sheet resistance increases in the order: graphene < P-graphene < N-graphene. This tendency is related to the density of defects evaluated from the ratio of intensities of Raman peaks, valence band XPS and NEXAFS spectroscopy data.
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Ganesh S, Venkatakrishnan K, Tan B. Quantum scale organic semiconductors for SERS detection of DNA methylation and gene expression. Nat Commun 2020; 11:1135. [PMID: 32111825 PMCID: PMC7048788 DOI: 10.1038/s41467-020-14774-3] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 01/31/2020] [Indexed: 12/14/2022] Open
Abstract
Cancer stem cells (CSC) can be identified by modifications in their genomic DNA. Here, we report a concept of precisely shrinking an organic semiconductor surface-enhanced Raman scattering (SERS) probe to quantum size, for investigating the epigenetic profile of CSC. The probe is used for tag-free genomic DNA detection, an approach towards the advancement of single-molecule DNA detection. The sensor detected structural, molecular and gene expression aberrations of genomic DNA in femtomolar concentration simultaneously in a single test. In addition to pointing out the divergences in genomic DNA of cancerous and non-cancerous cells, the quantum scale organic semiconductor was able to trace the expression of two genes which are frequently used as CSC markers. The quantum scale organic semiconductor holds the potential to be a new tool for label-free, ultra-sensitive multiplexed genomic analysis.
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Affiliation(s)
- Swarna Ganesh
- Institute for Biomedical Engineering, Science and Technology (I BEST), Partnership between Ryerson University and St. Michael's Hospital, Toronto, ON, M5B 1W8, Canada.,Department of Mechanical and Industrial Engineering, Ultrashort Laser Nanomanufacturing Research Facility, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada.,Department of Mechanical and Industrial Engineering, Nano Bio Interface facility, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada
| | - Krishnan Venkatakrishnan
- Department of Mechanical and Industrial Engineering, Ultrashort Laser Nanomanufacturing Research Facility, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada. .,Department of Mechanical and Industrial Engineering, Nano Bio Interface facility, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada. .,Keenan Research Center, St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1T8, Canada.
| | - Bo Tan
- Department of Mechanical and Industrial Engineering, Nano Bio Interface facility, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada.,Keenan Research Center, St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1T8, Canada.,Nanocharacterization Laboratory, Department of Aerospace Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada
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45
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Upadhyay KK, Bundaleska N, Abrashev M, Bundaleski N, Teodoro O, Fonseca I, de Ferro AM, Silva RP, Tatarova E, Montemor M. Free-standing N-Graphene as conductive matrix for Ni(OH)2 based supercapacitive electrodes. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2019.135592] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Srivastava S, Jain SK, Gupta G, Senguttuvan TD, Gupta BK. Boron-doped few-layer graphene nanosheet gas sensor for enhanced ammonia sensing at room temperature. RSC Adv 2020; 10:1007-1014. [PMID: 35494469 PMCID: PMC9047397 DOI: 10.1039/c9ra08707a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 09/30/2020] [Accepted: 12/18/2019] [Indexed: 11/21/2022] Open
Abstract
Heteroatom doping in graphene is now a practiced way to alter its electronic and chemical properties to design a highly-efficient gas sensor for practical applications. In this series, here we propose boron-doped few-layer graphene for enhanced ammonia gas sensing, which could be a potential candidate for designing a sensing device. A facile approach has been used for synthesizing boron-doped few-layer graphene (BFLGr) by using a low-pressure chemical vapor deposition (LPCVD) method. Further, Raman spectroscopy has been performed to confirm the formation of graphene and XPS and FESEM characterization were carried out to validate the boron doping in the graphene lattice. To fabricate the gas sensing device, an Si/SiO2 substrate with gold patterned electrodes was used. More remarkably, the BFLGr-based sensor exhibits an extremely quick response for ammonia gas sensing with fast recovery at ambient conditions. Hence, the obtained results for the BFLGr-based gas sensor provide a new platform to design next-generation lightweight and fast gas sensing devices. A boron-doped few-layer LPCVD graphene sensor is successfully designed and demonstrated for enhanced NH3 gas sensing applications.![]()
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Affiliation(s)
- Shubhda Srivastava
- CSIR-National Physical Laboratory
- New Delhi
- India
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR-National Physical Laboratory Campus
| | - Shubhendra K. Jain
- CSIR-National Physical Laboratory
- New Delhi
- India
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR-National Physical Laboratory Campus
| | - Govind Gupta
- CSIR-National Physical Laboratory
- New Delhi
- India
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR-National Physical Laboratory Campus
| | - T. D. Senguttuvan
- CSIR-National Physical Laboratory
- New Delhi
- India
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR-National Physical Laboratory Campus
| | - Bipin Kumar Gupta
- CSIR-National Physical Laboratory
- New Delhi
- India
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR-National Physical Laboratory Campus
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Kulandaiswamy AJ, Sharma N, Nesakumar N, Kailasam K, Rayappan JBB. S,N‐GQDs Enzyme Mimicked Electrochemical Sensor to Detect the Hazardous Level of Monocrotophos in Water. ELECTROANAL 2019. [DOI: 10.1002/elan.201900447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Nidhi Sharma
- Institute of Nano Science and Technology Habitat Center, Phase 10 Mohali 160 062 India
| | - Noel Nesakumar
- Centre for Nano Technology and Advanced Biomaterials (CeNTAB) SASTRA Deemed University Thanjavur 613 401, Tamil Nadu India
| | - Kamalakannan Kailasam
- Institute of Nano Science and Technology Habitat Center, Phase 10 Mohali 160 062 India
| | - John Bosco Balaguru Rayappan
- School of Electrical and Electronics Engineering SASTRA Deemed University Thanjavur 613 401, Tamil Nadu India
- Centre for Nano Technology and Advanced Biomaterials (CeNTAB) SASTRA Deemed University Thanjavur 613 401, Tamil Nadu India
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48
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Nitrogen-doped graphene oxide as a catalyst for the oxidation of Rhodamine B by hydrogen peroxide: application to a sensitive fluorometric assay for hydrogen peroxide. Mikrochim Acta 2019; 187:47. [PMID: 31845299 DOI: 10.1007/s00604-019-3994-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 10/31/2019] [Indexed: 10/25/2022]
Abstract
The authors report that nitrogen-doped graphene oxide (NGO) catalyzes the oxidative decomposition of the fluorophore Rhodamine B (RhB) by hydrogen peroxide. The catalytic decomposition of hydrogen peroxide yields free hydroxyl radicals that destroy RhB so that the intensity of the yellow fluorescence is reduced. Nitrogen doping enhances the electronic and optical properties and surface chemical reactivities of GO such as widening of bandgap, increase in conductivity, enhanced quenching and adsorbing capabilities etc. The catalytic properties of NGO are attributed to its large specific surface and high electron affinity of nitrogen atoms. The chemical and structural properties of GO and NGO were characterized by XRD, FTIR, SEM, UV-visible and Raman spectroscopies. The method was optimized by varying the concentration of RhB, nitrogen dopant and hydrogen peroxide. The fluorescent probe, best operated at excitation/emission wavelengths of 554/577 nm, allows hydrogen peroxide to be determined in concentrations as low as 94 pM with a linear range spanning from 1 nM to 1 μM. Graphical abstract Schematic illustration of a fluorescence quenching method for the determination of H2O2. Upon addition of H2O2, nitrogen-doped graphene oxide (NGO) catalyzes the oxidation of Rhodamine B dye due to hydroxyl radical generation, which leads to a sensitive quenchometric methd for H2 O2.
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Yano Y, Mitoma N, Ito H, Itami K. A Quest for Structurally Uniform Graphene Nanoribbons: Synthesis, Properties, and Applications. J Org Chem 2019; 85:4-33. [DOI: 10.1021/acs.joc.9b02814] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuuta Yano
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Nobuhiko Mitoma
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Hideto Ito
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Kenichiro Itami
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya 464-8602, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya 464-8602, Japan
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50
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Li XF, Yan WW, Rao JR, Liu DX, Zhang XH, Cao X, Luo Y. Ultrahigh conductivity of graphene nanoribbons doped with ordered nitrogen. NANOSCALE ADVANCES 2019; 1:4359-4364. [PMID: 36134412 PMCID: PMC9417508 DOI: 10.1039/c9na00458k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 09/03/2019] [Indexed: 06/16/2023]
Abstract
Graphene is an attractive candidate for developing high conductivity materials (HCMs) owing to an extraordinary charge mobility. While graphene itself is a semi-metal with an inherently low carrier density, and methods used for increasing carrier density normally also cause a marked decrease in charge mobility. Here, we report that ordered nitrogen doping can induce a pronounced increase in carrier density but does not harm the high charge mobility of graphene nanoribbons (GNRs), giving rise to an unprecedented ultrahigh conductivity in the system. Our first-principles calculations for orderly N-doped GNRs (referred to as C5N-GNRs) show that N-doping causes a significant shift-up of the Fermi level (ΔE F), resulting in the presence of multiple partially-filled energy bands (PFEDs) that primarily increase the carrier density of system. Notably, the PFEDs are delocalized well with integral and quantized transmissions, suggesting a negligible effect from N-doping on the charge mobility. Moreover, the PFEDs can cross the E F multiple times as the ribbon widens, causing the conductivity to increase monotonically and reach ultrahigh values (>15G 0) in sub-5 nm wide ribbons with either armchair or zigzag edges. Furthermore, a simple linear relationship between the doing concentration and the ΔE F was obtained, which provides a robust means for controlling the conductivity of C5N-GNRs. Our findings should be useful for understanding the effect of ordered atomic doping on the conductivity of graphene and may open new avenues for realizing graphene-based HCMs.
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Affiliation(s)
- Xiao-Fei Li
- School of Optoelectronic Science and Engineering, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China Chengdu Sichuan 610054 China
| | - Wei-Wei Yan
- School of Optoelectronic Science and Engineering, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China Chengdu Sichuan 610054 China
| | - Jia-Rui Rao
- School of Optoelectronic Science and Engineering, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China Chengdu Sichuan 610054 China
| | - Dong-Xue Liu
- School of Optoelectronic Science and Engineering, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China Chengdu Sichuan 610054 China
| | - Xiang-Hua Zhang
- School of Optoelectronic Science and Engineering, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China Chengdu Sichuan 610054 China
- Department of Electrical and Information Engineering, Hunan Institute of Engineering Xiangtan Hunan 411101 China
| | - Xinrui Cao
- Institute of Theoretical Physics and Astrophysics, Department of Physics, Xiamen University Xiamen 361005 China
| | - Yi Luo
- Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China Hefei Anhui 230026 P. R. China
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