1
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Wang F, Peng W, Huo D, Zhang J, Deng S, Huang L, Tan S. Cu 2-xS homojunction coatings empower titanium implants with near-infrared-triggered antibacterial and antifouling properties. J Mater Chem B 2024; 12:5917-5929. [PMID: 38804511 DOI: 10.1039/d4tb00235k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
For decades, implant-associated infections (IAIs) caused by pathogenic bacteria have been associated with high failure and mortality rates in implantation surgeries, posing a serious threat to global public health. Therefore, developing a functionalized biomaterial coating with anti-fouling and anti-bacterial functions is crucial for alleviating implant infections. Herein, a near-infrared-responsive anti-bacterial and anti-adhesive coating (Ti-PEG-Cu2-xS) constructed on the surface of titanium (Ti) implants is reported. This coating is composed of nano-Cu2-xS with anti-bacterial activity and super-hydrophilic polyethylene glycol (PEG). Under near-infrared irradiation, the nano-catalyst Cu2-xS on the surface of Ti-PEG-Cu2-xS induces bacterial death by catalyzing the production of singlet oxygen (1O2). The Ti-PEG-Cu2-xS coating can effectively prevent bacterial adhesion and biofilm formation. This coating combines the antibacterial mechanisms of "active attack" and "passive defense", which can kill bacteria and inhibit biofilm formation. The results of in vitro and in vivo experiments have shown that Ti-PEG-Cu2-xS exhibits excellent anti-bacterial properties under near-infrared irradiation and can effectively prevent implant-related infections caused by Escherichia coli (E. coli) ATCC 8739 and Staphylococcus aureus (S. aureus). The antibacterial efficiency of Ti-PEG-Cu2-xS coatings against E. coli was 99.96% ± 0.058% and that of S. aureus was 99.66% ± 0.26%, respectively. In addition, the Ti-PEG-Cu2-xS coating has good blood compatibility and excellent bactericidal ability. Therefore, this multifunctional coating combines a non-adhesive surface strategy and a near-infrared phototherapy sterilization method, effectively blocking the initial attachment and proliferation of bacteria on implants via photothermal/photodynamic effects and providing a promising method for preventing bacterium-induced IAIs.
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Affiliation(s)
- Fengqian Wang
- Guangdong Engineering & Technology Research Centre of Graphene-like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
| | - Weicong Peng
- Guangdong Engineering & Technology Research Centre of Graphene-like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
| | - Dongliang Huo
- Guangdong Engineering & Technology Research Centre of Graphene-like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
| | - Jingxian Zhang
- Guangdong Engineering & Technology Research Centre of Graphene-like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
| | - Suiping Deng
- Guangdong Engineering & Technology Research Centre of Graphene-like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
| | - Langhuan Huang
- Guangdong Engineering & Technology Research Centre of Graphene-like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
- Guangdong Jianpai New Materials Co., Ltd, Foshan 528500, P. R. China
| | - Shaozao Tan
- Guangdong Engineering & Technology Research Centre of Graphene-like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
- Guangdong Jianpai New Materials Co., Ltd, Foshan 528500, P. R. China
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2
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Minev N, Buchkov K, Todorova N, Todorov R, Videva V, Stefanova M, Rafailov P, Karashanova D, Dikov H, Strijkova V, Trapalis C, Lin SH, Dimitrov D, Marinova V. Synthesis of 2D PtSe 2 Nanolayers on Glass Substrates and Their Integration in Near-Infrared Light Shutters. ACS OMEGA 2024; 9:14874-14886. [PMID: 38585138 PMCID: PMC10993254 DOI: 10.1021/acsomega.3c08235] [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: 10/19/2023] [Revised: 03/02/2024] [Accepted: 03/06/2024] [Indexed: 04/09/2024]
Abstract
PtSe2 has asserted its key role among the emerging 2D transition metal dichalcogenides, however, its simplified growth process with controlled number of layers, high crystalline quality, and on inexpensive substrates is still challenging. Here, we report the synthesis details of PtSe2 layers on soda lime glass substrates by selenization of predeposited Pt layers using the thermally assisted conversion method at atmospheric pressure. PtSe2 syntheses are confirmed by X-ray photoelectron spectroscopy and Raman analysis. The layers were further investigated with transmission electron microscopy and optical ellipsometry, revealing the thickness and its dependence on the metal precursor sputtering time. Finally, the integration of PtSe2 as transparent conductive layers in polymer-dispersed liquid crystal structures operating as near-infrared light shutters is demonstrated and device performance is discussed. The proposed simple and inexpensive synthesis approach opens up new directions toward PtSe2 potential technological applications, including ITO-free optoelectronics.
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Affiliation(s)
- Nikolay Minev
- Institute
of Optical Materials and Technologies, Bulgarian
Academy of Sciences, Acad. G. Bontchev Str. 109, 1113 Sofia, Bulgaria
| | - Krastyo Buchkov
- Institute
of Solid-State Physics, Bulgarian Academy
of Sciences, 72, Tzarigradsko
Chaussee Blvd, 1784 Sofia, Bulgaria
| | - Nadia Todorova
- Institute
of Nanoscience and Nanotechnology, National
Centre for Scientific Research “Demokritos” 15341 Agia Paraskevi, Greece
| | - Rosen Todorov
- Institute
of Optical Materials and Technologies, Bulgarian
Academy of Sciences, Acad. G. Bontchev Str. 109, 1113 Sofia, Bulgaria
| | - Vladimira Videva
- Institute
of Optical Materials and Technologies, Bulgarian
Academy of Sciences, Acad. G. Bontchev Str. 109, 1113 Sofia, Bulgaria
- Faculty
of Chemistry and Pharmacy, Sofia University, 1 James Bourchier Blvd., 1164 Sofia, Bulgaria
| | - Maria Stefanova
- Institute
of Optical Materials and Technologies, Bulgarian
Academy of Sciences, Acad. G. Bontchev Str. 109, 1113 Sofia, Bulgaria
| | - Peter Rafailov
- Institute
of Solid-State Physics, Bulgarian Academy
of Sciences, 72, Tzarigradsko
Chaussee Blvd, 1784 Sofia, Bulgaria
| | - Daniela Karashanova
- Institute
of Optical Materials and Technologies, Bulgarian
Academy of Sciences, Acad. G. Bontchev Str. 109, 1113 Sofia, Bulgaria
| | - Hristosko Dikov
- Central
Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria
| | - Velichka Strijkova
- Institute
of Optical Materials and Technologies, Bulgarian
Academy of Sciences, Acad. G. Bontchev Str. 109, 1113 Sofia, Bulgaria
| | - Christos Trapalis
- Institute
of Nanoscience and Nanotechnology, National
Centre for Scientific Research “Demokritos” 15341 Agia Paraskevi, Greece
| | - Shiuan Huei Lin
- Department
of Electrophysics, National Yang Ming Chiao
Tung University, 30010 Hsinchu, Taiwan
| | - Dimitre Dimitrov
- Institute
of Optical Materials and Technologies, Bulgarian
Academy of Sciences, Acad. G. Bontchev Str. 109, 1113 Sofia, Bulgaria
- Institute
of Solid-State Physics, Bulgarian Academy
of Sciences, 72, Tzarigradsko
Chaussee Blvd, 1784 Sofia, Bulgaria
| | - Vera Marinova
- Institute
of Optical Materials and Technologies, Bulgarian
Academy of Sciences, Acad. G. Bontchev Str. 109, 1113 Sofia, Bulgaria
- Department
of Electrophysics, National Yang Ming Chiao
Tung University, 30010 Hsinchu, Taiwan
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3
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Zhou J, Cheng H, Cheng J, Wang L, Xu H. The Emergence of High-Performance Conjugated Polymer/Inorganic Semiconductor Hybrid Photoelectrodes for Solar-Driven Photoelectrochemical Water Splitting. SMALL METHODS 2024; 8:e2300418. [PMID: 37421184 DOI: 10.1002/smtd.202300418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/15/2023] [Indexed: 07/10/2023]
Abstract
Solar-driven photoelectrochemical (PEC) energy conversion holds great potential in converting solar energy into storable and transportable chemicals or fuels, providing a viable route toward a carbon-neutral society. Conjugated polymers are rapidly emerging as a new class of materials for PEC water splitting. They exhibit many intriguing properties including tunable electronic structures through molecular engineering, excellent light harvesting capability with high absorption coefficients, and facile fabrication of large-area thin films via solution processing. Recent advances have indicated that integrating rationally designed conjugated polymers with inorganic semiconductors is a promising strategy for fabricating efficient and stable hybrid photoelectrodes for high-efficiency PEC water splitting. This review introduces the history of developing conjugated polymers for PEC water splitting. Notable examples of utilizing conjugated polymers to broaden the light absorption range, improve stability, and enhance the charge separation efficiency of hybrid photoelectrodes are highlighted. Furthermore, key challenges and future research opportunities for further improvements are also presented. This review provides an up-to-date overview of fabricating stable and high-efficiency PEC devices by integrating conjugated polymers with state-of-the-art semiconductors and would have significant implications for the broad solar-to-chemical energy conversion research.
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Affiliation(s)
- Jie Zhou
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Key Laboratory of Precision and Intelligent Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Hao Cheng
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Key Laboratory of Precision and Intelligent Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Jun Cheng
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Key Laboratory of Precision and Intelligent Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Lei Wang
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Key Laboratory of Precision and Intelligent Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Hangxun Xu
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Key Laboratory of Precision and Intelligent Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
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4
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Li B, Yang W, Shu R, Yang H, Yang F, Dai W, Chen W, Chan YK, Bai D, Deng Y. Antibacterial and Angiogenic (2A) Bio-Heterojunctions Facilitate Infectious Ischemic Wound Regeneration via an Endogenous-Exogenous Bistimulatory Strategy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307613. [PMID: 37848208 DOI: 10.1002/adma.202307613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 09/23/2023] [Indexed: 10/19/2023]
Abstract
In infectious ischemic wounds, a lack of blood perfusion significantly worsens microbe-associated infection symptoms and frequently complicates healing. To overcome this daunting issue, antibacterial and angiogenic (2A) bio-heterojunctions (bio-HJs) consisting of CuS/MXene heterojunctions and a vascular endothelial growth factor (VEGF)-mimicking peptide (VMP) are devised and developed to accelerate infectious cutaneous regeneration by boosting angiogenesis via an endogenous-exogenous bistimulatory (EEB) strategy. Assisted by near-infrared irradiation, the bio-HJ platform exhibits versatile synergistic photothermal, photodynamic, and chemodynamic effects for robust antibacterial efficacy. In addition, copper ions liberated from 2A bio-HJs elevate VEGF secretion from fibroblasts, which provokes VEGF receptors (VEGFR) activation through an endogenous pathway, whereas VMP itself promotes an exogenous pathway to facilitate endothelial cell multiplication and tube formation by directly activating the VEGFR signaling pathway. Moreover, employing an in vivo model of infectious ischemic wounds, it is confirmed that the EEB strategy can considerably boost cutaneous regeneration through pathogen elimination, angiogenesis promotion, and collagen deposition. As envisaged, this work leads to the development of a powerful 2A bio-HJ platform that can serve as an effective remedy for bacterial invasion-induced ischemic wounds through the EEB strategy.
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Affiliation(s)
- Bin Li
- West China Hospital of Stomatology, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics and Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610065, China
| | - Weizhong Yang
- College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
| | - Rui Shu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics and Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610065, China
| | - Hang Yang
- College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
| | - Fan Yang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics and Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610065, China
| | - Wenyu Dai
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics and Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610065, China
| | - Wanxi Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics and Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610065, China
| | - Yau Kei Chan
- Department of Ophthalmology, The University of Hong Kong, Hong Kong, Hong Kong SAR, 999077, China
| | - Ding Bai
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics and Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610065, China
| | - Yi Deng
- West China Hospital of Stomatology, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, 999077, China
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5
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Ahmad W, Wu J, Zhuang Q, Neogi A, Wang Z. Research Process on Photodetectors based on Group-10 Transition Metal Dichalcogenides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207641. [PMID: 36658722 DOI: 10.1002/smll.202207641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/01/2023] [Indexed: 06/17/2023]
Abstract
Rapidly evolving group-10 transition metal dichalcogenides (TMDCs) offer remarkable electronic, optical, and mechanical properties, making them promising candidates for advanced optoelectronic applications. Compared to most TMDCs semiconductors, group-10-TMDCs possess unique structures, narrow bandgap, and influential physical properties that motivate the development of broadband photodetectors, specifically infrared photodetectors. This review presents the latest developments in the fabrication of broadband photodetectors based on conventional 2D TMDCs. It mainly focuses on the recent developments in group-10 TMDCs from the perspective of the lattice structure and synthesis techniques. Recent progress in group-10 TMDCs and their heterostructures with different dimensionality of materials-based broadband photodetectors is provided. Moreover, this review accounts for the latest applications of group-10 TMDCs in the fields of nanoelectronics and optoelectronics. Finally, conclusions and outlooks are summarized to provide perspectives for next-generation broadband photodetectors based on group-10 TMDCs.
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Affiliation(s)
- Waqas Ahmad
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Jiang Wu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Qiandong Zhuang
- Physics Department, Lancaster University, Lancaster, LA14YB, UK
| | - Arup Neogi
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
- Institute for Advanced Study, Chengdu University, Chengdu, 610106, China
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6
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Besse R, Wang H, West D, Da Silva JLF, Zhang S. Prediction of Effective Photoelectron and Hole Separation in Type-I MoS 2/PtSe 2 van der Waals Junction. J Phys Chem Lett 2022; 13:6407-6411. [PMID: 35802831 DOI: 10.1021/acs.jpclett.2c01526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Understanding the dynamics of charge transfer at vertical heterostructures of transition metal dichalcogenide monolayers is fundamentally important for future technological applications, given the unique feature of van der Waals interactions at the interface. Here, we employ time-dependent density functional theory formalism combined with molecular dynamics to investigate photoexcited electrons and holes in the type-I MoS2/PtSe2 van der Waals heterobilayer. While type-I junctions have been traditionally viewed as being ineffective in photocarrier separation, we show that here a different mechanism from type-II is at play, which effectively separates photoelectrons from photoholes. The key is the phonon bottleneck, arising from the characteristically different dynamic band alignments in the valence and conduction bands, respectively, which only affects the transfer of holes but not electrons. The disparity between electron and hole transfer rates offers a new direction for effective control of charge separation at interfaces.
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Affiliation(s)
- Rafael Besse
- São Carlos Institute of Physics, University of São Paulo, P.O. Box 369, 13560-970, São Carlos, São Paulo Brazil
- Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Han Wang
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Damien West
- Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Juarez L F Da Silva
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, 13560-970, São Carlos, São Paulo Brazil
| | - Shengbai Zhang
- Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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7
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Wang S, Mao Q, Ren H, Wang W, Wang Z, Xu Y, Li X, Wang L, Wang H. Liquid Metal Interfacial Growth and Exfoliation to Form Mesoporous Metallic Nanosheets for Alkaline Methanol Electroreforming. ACS NANO 2022; 16:2978-2987. [PMID: 35061352 DOI: 10.1021/acsnano.1c10262] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Two-dimensional (2D) materials have spurred great interest in the field of catalysis due to their fascinating electronic and thermal transport properties. However, adding uniform mesopores to 2D metallic materials has remained a great challenge owing to the inherent high surface energy. Here, we introduce a generic liquid metal interfacial growth and exfoliation strategy to synthesize a library of penetrating mesoporous metallic nanosheets. The formation of liquid-metal/water interface promotes the adsorption of metal ion-encapsulated copolymer micelles, induces the self-limiting galvanic replacement reaction, and enables the exfoliation of products under mechanical agitation. These 2D mesoporous metallic nanosheets with large lateral size, narrow thickness distribution, and uniform perforated structure provide facilitated channels and abundant active sites for catalysis. Typically, the generated mesoporous PtRh nanosheets (mPtRh NSs) exhibit superior electroactivity and durability in hydrogen evolution reaction as well as methanol electrooxidation in alkaline media. Moreover, the constructed symmetric mPtRh NSs cell requires only a relative low electrolysis voltage to achieve methanol-assisted hydrogen production compared with traditional overall water electrolysis. The work reveals a specific growth pattern of noble metals at the liquid-metal/water interface and thus introduces a versatile strategy to form 2D penetrating mesoporous metallic nanomaterials with extensive high-performance applications.
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Affiliation(s)
- Shengqi Wang
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
| | - Qiqi Mao
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
| | - Hang Ren
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
| | - Wenxin Wang
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
| | - Ziqiang Wang
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
| | - You Xu
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
| | - Xiaonian Li
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
| | - Liang Wang
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
| | - Hongjing Wang
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang road, Hangzhou, Zhejiang 310014, P. R. China
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8
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Pribusová Slušná L, Vojteková T, Hrdá J, Pálková H, Siffalovic P, Sojková M, Végsö K, Hutár P, Dobročka E, Varga M, Hulman M. Optical Characterization of Few-Layer PtSe 2 Nanosheet Films. ACS OMEGA 2021; 6:35398-35403. [PMID: 34984271 PMCID: PMC8717396 DOI: 10.1021/acsomega.1c04768] [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: 08/31/2021] [Accepted: 11/30/2021] [Indexed: 06/14/2023]
Abstract
Thin films of transition-metal dichalcogenides are potential materials for optoelectronic applications. However, the application of these materials in practice requires knowledge of their fundamental optical properties. Many existing methods determine optical constants using predefined models. Here, a different approach was used. We determine the sheet conductance and absorption coefficient of few-layer PtSe2 in the infrared and UV-vis ranges without recourse to any particular model for the optical constants. PtSe2 samples with a thickness of about 3-4 layers were prepared by selenization of 0.5 nm thick platinum films on sapphire substrates at different temperatures. Differential reflectance was extracted from transmittance and reflectance measurements from the front and back of the sample. The film thickness, limited to a few atomic layers, allowed a thin-film approximation to calculate the optical conductance and absorption coefficient. The former has a very different energy dependence in the infrared, near-infrared, and visible ranges. The absorption coefficient exhibits a strong power-law dependence on energy with an exponent larger than three in the mid-infrared and near-infrared regions. We have not observed any evidence for a band gap in PtSe2 thin layers down to an energy of 0.4 eV from our optical measurements.
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Affiliation(s)
- Lenka Pribusová Slušná
- Institute
of Electrical Engineering, Slovak Academy
of Sciences, Dúbravská cesta 9, 84104 Bratislava, Slovakia
| | - Tatiana Vojteková
- Institute
of Electrical Engineering, Slovak Academy
of Sciences, Dúbravská cesta 9, 84104 Bratislava, Slovakia
| | - Jana Hrdá
- Institute
of Electrical Engineering, Slovak Academy
of Sciences, Dúbravská cesta 9, 84104 Bratislava, Slovakia
| | - Helena Pálková
- Institute
of Inorganic Chemistry, Slovak Academy of
Sciences, Dúbravská cesta 9, 84536 Bratislava, Slovakia
| | - Peter Siffalovic
- Institute
of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84511 Bratislava, Slovakia
- Centre
for Advanced Materials Application, Dúbravská cesta 9, 84511 Bratislava, Slovakia
| | - Michaela Sojková
- Institute
of Electrical Engineering, Slovak Academy
of Sciences, Dúbravská cesta 9, 84104 Bratislava, Slovakia
| | - Karol Végsö
- Institute
of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84511 Bratislava, Slovakia
| | - Peter Hutár
- Institute
of Electrical Engineering, Slovak Academy
of Sciences, Dúbravská cesta 9, 84104 Bratislava, Slovakia
| | - Edmund Dobročka
- Institute
of Electrical Engineering, Slovak Academy
of Sciences, Dúbravská cesta 9, 84104 Bratislava, Slovakia
| | - Marián Varga
- Institute
of Electrical Engineering, Slovak Academy
of Sciences, Dúbravská cesta 9, 84104 Bratislava, Slovakia
| | - Martin Hulman
- Institute
of Electrical Engineering, Slovak Academy
of Sciences, Dúbravská cesta 9, 84104 Bratislava, Slovakia
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9
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Wang P, He D, Wang Y, Zhang X, He X, He J, Zhao H. Ultrafast Interlayer Charge Transfer between Bilayer PtSe 2 and Monolayer WS 2. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57822-57830. [PMID: 34797636 DOI: 10.1021/acsami.1c18189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Interlayer charge transfer (CT) between PtSe2 and WS2 is studied experimentally. Layer-selective pump-probe and photoluminescence quenching measurements reveal ultrafast interlayer CT in the heterostructure formed by bilayer PtSe2 and monolayer WS2, confirming its type-II band alignment. The CT facilitates the formation of the interlayer excitons with a lifetime of several hundred ps to 1 ns, a diffusion coefficient of 0.9 cm2 s-1, and a diffusion length reaching 200 nm. These results demonstrate the integration of PtSe2 with other materials in van der Waals heterostructures with novel charge-transfer properties and help develop fundamental understanding on the performance of various optoelectronic devices based on heterostructures involving PtSe2.
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Affiliation(s)
- Pengzhi Wang
- College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
| | - Dawei He
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
| | - Yongsheng Wang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
| | - Xiaoxian Zhang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
| | - Xiaoyue He
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Jiaqi He
- College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
| | - Hui Zhao
- Department of Physics and Astronomy, The University of Kansas, Lawrence, Kansas 66045, United States
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10
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Gao X, Wei M, Ma D, Yang X, Zhang Y, Zhou X, Li L, Deng Y, Yang W. Engineering of a Hollow‐Structured Cu
2−
X
S Nano‐Homojunction Platform for Near Infrared‐Triggered Infected Wound Healing and Cancer Therapy. ADVANCED FUNCTIONAL MATERIALS 2021. [DOI: 10.1002/adfm.202106700] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xiangyu Gao
- College of Biomedical Engineering School of Chemical Engineering Sichuan University Chengdu 610065 China
| | - Mingtian Wei
- Department of Gastrointestinal Surgery West China Hospital Sichuan University Chengdu 610041 China
| | - Daichuan Ma
- Analytical & Testing Center Sichuan University Chengdu 610065 China
| | - Xuyang Yang
- Department of Gastrointestinal Surgery West China Hospital Sichuan University Chengdu 610041 China
| | - Yang Zhang
- Department of Gastrointestinal Surgery West China Hospital Sichuan University Chengdu 610041 China
| | - Xiong Zhou
- College of Biomedical Engineering School of Chemical Engineering Sichuan University Chengdu 610065 China
| | - Limei Li
- Science and Technology Achievement Incubation Center Kunming Medical University Kunming 650500 China
| | - Yi Deng
- College of Biomedical Engineering School of Chemical Engineering Sichuan University Chengdu 610065 China
- State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
- Department of Mechanical Engineering The University of Hong Kong Hong Kong SAR 999077 China
| | - Weizhong Yang
- College of Biomedical Engineering School of Chemical Engineering Sichuan University Chengdu 610065 China
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