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Fabrication of sandwich structured C/NiO/TiO2 nanotube arrays for enhanced electrocatalytic activity towards hydrogen evolution. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.10.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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Shi J, Hong M, Zhang Z, Ji Q, Zhang Y. Physical properties and potential applications of two-dimensional metallic transition metal dichalcogenides. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.07.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Wu J, Xie L. Structural Quantification for Graphene and Related Two-Dimensional Materials by Raman Spectroscopy. Anal Chem 2018; 91:468-481. [DOI: 10.1021/acs.analchem.8b04991] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Juanxia Wu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Liming Xie
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- International College, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Radhakrishnan S, Das D, Deng L, Sudeep PM, Colas G, de Los Reyes CA, Yazdi S, Chu CW, Martí AA, Tiwary CS, Filleter T, Singh AK, Ajayan PM. An Insight into the Phase Transformation of WS 2 upon Fluorination. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1803366. [PMID: 30239044 DOI: 10.1002/adma.201803366] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 08/20/2018] [Indexed: 06/08/2023]
Abstract
The transformation from semiconducting to metallic phase, accompanied by a structural transition in 2D transition metal dichalcogenides has attracted the attention of the researchers worldwide. The unconventional structural transformation of fluorinated WS2 (FWS2 ) into the 1T phase is described. The energy difference between the two phases debugs this transition, as fluorination enhances the stability of 1T FWS2 and makes it energetically favorable at higher F concentration. Investigation of the electronic and optical nature of FWS2 is supplemented by possible band structures and bandgap calculations. Magnetic centers in the 1T phase appear in FWS2 possibly due to the introduction of defect sites. A direct consequence of the phase transition and associated increase in interlayer spacing is a change in friction behavior. Friction force microscopy is used to determine this effect of functionalization accompanied phase transformation.
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Affiliation(s)
- Sruthi Radhakrishnan
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
| | - Deya Das
- Materials Research Center, Indian Institute of Science, Bangalore, 560012, India
| | - Liangzi Deng
- Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX, 77004, USA
| | - Parambath M Sudeep
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, M5S3G8, Canada
| | - Guillaume Colas
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, M5S3G8, Canada
| | | | - Sadegh Yazdi
- Renewable and Sustainable Energy Institute, University of Colorado, Boulder, CO, 80309, USA
| | - Ching Wu Chu
- Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX, 77004, USA
- Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA
| | - Angel A Martí
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Chandra Sekhar Tiwary
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
- Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
| | - Tobin Filleter
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, M5S3G8, Canada
| | - Abhishek K Singh
- Materials Research Center, Indian Institute of Science, Bangalore, 560012, India
| | - Pulickel M Ajayan
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
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Agarwal V, Chatterjee K. Recent advances in the field of transition metal dichalcogenides for biomedical applications. NANOSCALE 2018; 10:16365-16397. [PMID: 30151537 DOI: 10.1039/c8nr04284e] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Nanosheets of transition metal dichalcogenide (TMDs), the graphene-like two-dimensional (2D) materials, exhibit a unique combination of properties and have attracted enormous research interest for a wide range of applications including catalysis, functional electronics, solid lubrication, photovoltaics, energy materials and most recently in biomedical applications. Their potential for use in biosensors, drug delivery, multimodal imaging, antimicrobial agents and tissue engineering is being actively studied. However, the commercial translation of exfoliated TMDs has been limited due to the low aqueous solubility, non-uniformity, lack of control over the layer thickness, and the long-term colloidal stability of the exfoliated material. There is wide interest in the synthesis and exfoliation of TMDs resulting in the reporting of increasing numbers of new methods and their biomedical applications. The unique physicochemical characteristics of the TMD nanosheets have been exploited to tether them with biological payload to achieve selective localized delivery in vivo. The large surface-to-volume ratio, good cytocompatibility, ease of surface modification, tunable bandgap, strong spin-orbit coupling, and high optical and thermal conversion efficiency of TMD nanosheets make them favorable over traditional nanomaterials for biomedical research. Moreover, the presence of abundant active edge sites on the 2D TMDs makes them suitable for catalytic activities, while the large surface area and the interspace between layers are particularly conducive to ion or small molecule intercalation, making them useful for energy storage applications with rapid redox reaction capabilities. One of the major limitations of the exfoliated TMDs has been their limited colloidal stability in aqueous media. In this review, we summarize the recent advances in the exfoliation and synthesis of single-layered TMDs, their biomedical efficacy in terms of cytotoxicity, combinatorial therapy and diagnostic imaging, as well as antimicrobial activity. We highlight the current challenges in the field and propose strategies for the future.
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Affiliation(s)
- Vipul Agarwal
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka 560012, India.
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Zhang H, He H, Jiang X, Xia Z, Wei W. Preparation and Characterization of Chiral Transition-Metal Dichalcogenide Quantum Dots and Their Enantioselective Catalysis. ACS APPLIED MATERIALS & INTERFACES 2018; 10:30680-30688. [PMID: 30113158 DOI: 10.1021/acsami.8b10594] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Two-dimensional transition-metal dichalcogenides (TMDs) had attracted enormous interests owing to their extraordinary optical, physical, and chemical properties. Herein, we prepared for the first time a series of chiral TMD quantum dots (QDs) from MoS2 and WS2 bulk crystals by covalent modification with chiral ligands cysteine and penicillamine. The chiral TMD QDs were carefully investigated by spectroscopic and microscopic techniques. Their chiral optical activity was confirmed by distinct circular dichroism signals different to those of the chiral ligands. Interestingly, with the assistance of copper ions, the chiral QDs displayed strong and chiral selective peroxidase-like activity. Up to now, inorganic nanomaterials with peroxidase-like activity were tremendous but seldom examples with enantioselectivity. The enantioselectivity of our chiral TMD QDs toward chiral substrates d- and l-tyrosinol was highly up to 6.77, which was almost the best performance ever reported. The mechanisms of enantioselectivity was further investigated by quartz crystal microbalance assays. We believed that because of the extraordinary electronic and optical properties, the chiral TMD QDs should be useful for nonlinear optical materials, asymmetric catalysis, chiral and biological sensors, and so on.
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Affiliation(s)
- Huan Zhang
- School of Pharmaceutical Sciences and Innovative Drug Research Centre , Chongqing University , Chongqing 401331 , P. R. China
| | - Hui He
- School of Pharmaceutical Sciences and Innovative Drug Research Centre , Chongqing University , Chongqing 401331 , P. R. China
| | - Xuemei Jiang
- School of Pharmaceutical Sciences and Innovative Drug Research Centre , Chongqing University , Chongqing 401331 , P. R. China
| | - Zhining Xia
- School of Pharmaceutical Sciences and Innovative Drug Research Centre , Chongqing University , Chongqing 401331 , P. R. China
| | - Weili Wei
- School of Pharmaceutical Sciences and Innovative Drug Research Centre , Chongqing University , Chongqing 401331 , P. R. China
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Chung DY, Yoo JM, Park S, Jung GY, Kang JS, Ahn CY, Kwak SK, Sung YE. Edge-Terminated MoS 2 Nanoassembled Electrocatalyst via In Situ Hybridization with 3D Carbon Network. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1802191. [PMID: 30095220 DOI: 10.1002/smll.201802191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/08/2018] [Indexed: 06/08/2023]
Abstract
Transition metal dichalcogenides, especially MoS2 , are considered as promising electrocatalysts for hydrogen evolution reaction (HER). Since the physicochemical properties of MoS2 and electrode morphology are highly sensitive factor for HER performance, designed synthesis is highly pursued. Here, an in situ method to prepare a 3D carbon/MoS2 hybrid catalyst, motivated by the graphene ribbon synthesis process, is reported. By rational design strategies, the hybrid electrocatalysts with cross-connected porous structure are obtained, and they show a high HER activity even comparable to the state-of-the-art MoS2 catalyst without appreciable activity loss in long-term operations. Based on various physicochemical techniques, it is demonstrated that the synthetic procedure can effectively guide the formation of active site and 3D structure with a distinctive feature; increased exposure of active sites by decreased domain size and intrinsically high activity through controlling the number of stacking layers. Moreover, the importance of structural properties of the MoS2 -based catalysts is verified by controlled experiments, validating the effectiveness of the designed synthesis approach.
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Affiliation(s)
- Dong Young Chung
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Ji Mun Yoo
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Subin Park
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Gwan Yeong Jung
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jin Soo Kang
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Chi-Yeong Ahn
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Sang Kyu Kwak
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Yung-Eun Sung
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
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