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Ghosh R, Papnai B, Chen YS, Yadav K, Sankar R, Hsieh YP, Hofmann M, Chen YF. Exciton Manipulation for Enhancing Photoelectrochemical Hydrogen Evolution Reaction in Wrinkled 2D Heterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2210746. [PMID: 36756807 DOI: 10.1002/adma.202210746] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/16/2023] [Indexed: 06/18/2023]
Abstract
2D materials' junctions have demonstrated capabilities as metal-free alternatives for the hydrogen evolution reaction (HER). To date, the HER has been limited to heterojunctions of different compositions or band structures. Here, the potential of local strain modulation based on wrinkled 2D heterostructures is demonstrated, which helps to realize photoelectrocatalytically active junctions. By forming regions of high and low tensile strain in wrinkled WS2 monolayers, local modification of their band structure and internal electric field due to piezoelectricity is realized in the lateral direction. This structure produces efficient electron-hole pair generation due to light trapping and exciton funneling toward the crest of the WS2 wrinkles and enhances exciton separation. Additionally, the formation of wrinkles induces an air gap in-between the 2D layer and substrate, which reduces the interfacial scattering effect and consequently improves the charge-carrier mobility. A detailed study of the strain-dependence of the photocatalytic HER process demonstrates a 2-fold decrease in the Tafel slope and a 30-fold enhancement in exchange current density. Finally, optimization of the light absorption through functionalization with quantum dots produces unprecedented photoelectrocatalytic performance and provides a route toward the scalable formation of strain-modulated WS2 nanojunctions for future green energy generation.
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Affiliation(s)
- Rapti Ghosh
- Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 106, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
- Department of Physics, National Central University, Chung-Li, 320, Taiwan
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Bhartendu Papnai
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu City, 300044, Taiwan
- Nano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 106, Taiwan
- Institute of Physics, Academia Sinica, Taipei, 106, Taiwan
| | - Yu-Siang Chen
- Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 106, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
- Institute of Opto-Mechatronics, National Chung Cheng University, Chia-Yi, 62102, Taiwan
| | - Kanchan Yadav
- Nano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 106, Taiwan
| | - Raman Sankar
- Institute of Physics, Academia Sinica, Taipei, 106, Taiwan
| | - Ya-Ping Hsieh
- Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 106, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
| | - Mario Hofmann
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
- Advanced Research Centre for Green Materials Science and Technology, National Taiwan, University, Taipei, 106, Taiwan
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Bai X, Gao W, Cai Y, Bai Z, Qi Y, Yan B, Wang Y, Lu Z, Ding J. Advanced Stretchable Photodetectors: Strategies, Materials and Devices. Chemistry 2023; 29:e202203022. [PMID: 36367372 DOI: 10.1002/chem.202203022] [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: 09/27/2022] [Revised: 10/28/2022] [Accepted: 11/11/2022] [Indexed: 11/13/2022]
Abstract
Past decades have witnessed the generation of new stretchable photodetectors in electronic eyes, health sensing, wearable devices, intelligent monitoring and other fields. Stretchable devices require not only outstanding performance but also excellent flexibility, adaptability and stability. Innovative strategies have been proposed to realize the stretchability of devices. In addition, novel functional materials including zero-dimensional nanomaterials, one-dimensional inorganic nanomaterials, two-dimensional layered materials, organic materials, and organic-inorganic composite materials with excellent properties are emerging to continuously improve the performance of devices. Here, the recent research progress of stretchable photodetectors in terms of both various design methods and functional materials is outlined. The optical performance and stretchable properties are also comprehensively reviewed. Finally, a summary and the challenges associated with the application of stretchable photodetectors are presented.
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Affiliation(s)
- Xinyao Bai
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China
| | - Wanxiao Gao
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China
| | - Yunpeng Cai
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China
| | - Zhenxu Bai
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China.,MQ Photonics Research Centre, Department of Physics and Astronomy, Macquarie University, Sydney, NSW, 2109, Australia
| | - Yaoyao Qi
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China
| | - Bingzheng Yan
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China
| | - Yulei Wang
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China
| | - Zhiwei Lu
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China
| | - Jie Ding
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.,Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, P. R. China
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Ghosh R, Singh M, Chang LW, Lin HI, Chen YS, Muthu J, Papnai B, Kang YS, Liao YM, Bera KP, Guo GY, Hsieh YP, Hofmann M, Chen YF. Enhancing the Photoelectrochemical Hydrogen Evolution Reaction through Nanoscrolling of Two-Dimensional Material Heterojunctions. ACS NANO 2022; 16:5743-5751. [PMID: 35377604 DOI: 10.1021/acsnano.1c10772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The clean production of hydrogen from water using sunlight has emerged as a sustainable alternative toward large-scale energy generation and storage. However, designing photoactive semiconductors that are suitable for both light harvesting and water splitting is a pivotal challenge. Atomically thin transition metal dichalcogenides (TMD) are considered as promising photocatalysts because of their wide range of available electronic properties and compositional variability. However, trade-offs between carrier transport efficiency, light absorption, and electrochemical reactivity have limited their prospects. We here combine two approaches that synergistically enhance the efficiency of photocarrier generation and electrocatalytic efficiency of two-dimensional (2D) TMDs. The arrangement of monolayer WS2 and MoS2 into a heterojunction and subsequent nanostructuring into a nanoscroll (NS) yields significant modifications of fundamental properties from its constituents. Spectroscopic characterization and ab initio simulation demonstrate the beneficial effects of straining and wall interactions on the band structure of such a heterojunction-NS that enhance the electrochemical reaction rate by an order of magnitude compared to planar heterojunctions. Phototrapping in this NS further increases the light-matter interaction and yields superior photocatalytic performance compared to previously reported 2D material catalysts and is comparable to noble-metal catalyst systems in the photoelectrochemical hydrogen evolution reaction (PEC-HER) process. Our approach highlights the potential of morphologically varied TMD-based catalysts for PEC-HER.
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Affiliation(s)
- Rapti Ghosh
- Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 106, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 115, Taiwan
- Department of Physics, National Central University, Chung-Li 320, Taiwan
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Mukesh Singh
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Li Wei Chang
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
- Physics Division, National Center for Theoretical Sciences, Taipei 106, Taiwan
| | - Hung-I Lin
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Yu Siang Chen
- Institute of Opto-Mechatronics, National Chung Cheng University, Chia-Yi 62102, Taiwan
| | - Jeyavelan Muthu
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | | | - Yi Sun Kang
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | | | - Guang-Yu Guo
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
- Physics Division, National Center for Theoretical Sciences, Taipei 106, Taiwan
| | - Ya-Ping Hsieh
- Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 106, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Mario Hofmann
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
- Advanced Research Centre for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
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Masteri-Farahani M, Ghorbani F, Mosleh N. Boric acid modified S and N co-doped graphene quantum dots as simple and inexpensive turn-on fluorescent nanosensor for quantification of glucose. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 245:118892. [PMID: 32916423 DOI: 10.1016/j.saa.2020.118892] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 08/06/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
A new fluorescent nanosensor based on S and N co-doped graphene quantum dots (S,N-GQDs) modified by boric acid was designed for glucose detection. First, the S,N-GQDs was prepared via one pot hydrothermal process utilizing citric acid and thiourea as precursors. Then, S,N-GQDs was modified by boric acid to fabricate (B)/S,N-GQDs. The excitation dependent photoluminescence spectra of (B)/S,N-GQDs confirmed the heteroatom (S,N) dopant effect on GQDs emission. FT-IR and energy dispersive X-ray (EDX) spectroscopies confirmed the modification of S,N-GQDs with boric acid. The optical and electrochemical band gaps of the obtained (B)/S,N-GQDs were found to be 2.7 and 2.5 eV, respectively. The boric acid functionalized S,N-GQDs exhibited fluorescent enhancement at 455 nm upon addition of glucose. Such fluorescence response was used for glucose quantification with a detection limit of 5.5 μM which is comparable with previous boronic acid based fluorescent sensing systems. However, compared with earlier reported expensive boronic acid based glucose sensors, this modified system is simpler, more economical, and efficient. A mechanism was proposed for fluorescence enhancement based on the reaction of cis-diol units of glucose with the boric acid groups of (B)/S,N-GQDs which creates rigid (B)/S,N-GQDs-glucose structures, restricting the non-radiative intramolecular motions and results in the fluorescent enhancement.
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Affiliation(s)
- Majid Masteri-Farahani
- Faculty of Chemistry, Kharazmi University, Tehran, Iran; Research Institute of Green Chemistry, Kharazmi University, Tehran, Iran.
| | - Fatemeh Ghorbani
- Faculty of Chemistry, Kharazmi University, Tehran, Iran; Research Institute of Green Chemistry, Kharazmi University, Tehran, Iran
| | - Nazanin Mosleh
- Faculty of Chemistry, Kharazmi University, Tehran, Iran; Research Institute of Green Chemistry, Kharazmi University, Tehran, Iran
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Ghosh R, Lin HI, Chen YS, Singh M, Yen ZL, Chiu S, Lin HY, Bera KP, Liao YM, Hofmann M, Hsieh YP, Chen YF. QD/2D Hybrid Nanoscrolls: A New Class of Materials for High-Performance Polarized Photodetection and Ultralow Threshold Laser Action. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2003944. [PMID: 33079462 DOI: 10.1002/smll.202003944] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/26/2020] [Indexed: 06/11/2023]
Abstract
Nanoscrolls are a class of nanostructures where atomic layers of 2D materials are stacked consecutively in a coaxial manner to form a 1D spiral topography. Self-assembly of chemical vapor deposition grown 2D WS2 monolayer into quasi-1D van der Waals scroll structure instigates a plethora of unique physiochemical properties significantly different from its 2D counterparts. The physical properties of such nanoscrolls can be greatly manipulated upon hybridizing them with high-quantum-yield colloidal quantum dots, forming 0D/2D structures. The efficient dissociation of excitons at the heterojunctions of QD/2D hybridized nanoscrolls exhibits a 3000-fold increased photosensitivity compared to the pristine 2D-material-based nanoscroll. The synergistic effects of confined geometry and efficient QD scatterers produce a nanocavity with multiple feedback loops, resulting in coherent lasing action with an unprecedentedly low lasing threshold. Predominant localization of the excitons along the circumference of this helical scroll results in a 12-fold brighter emission for the parallel-polarized transition compared to the perpendicular one, as confirmed by finite-difference time-domain simulation. The versatility of hybridized nanoscrolls and their unique properties opens up a powerful route for not-yet-realized devices toward practical applications.
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Affiliation(s)
- Rapti Ghosh
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
- Department of Physics, National Central University, ChungLi, 320, Taiwan
- Molecular Science and Technology Program, Taiwan International Graduate Program, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Hung-I Lin
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
- Graduate Institute of Applied Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Yu-Siang Chen
- Institute of Opto-Mechatronics, National Chung Cheng University, Chiayi, 62102, Taiwan
| | - Mukesh Singh
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Zhi-Long Yen
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Shengkuei Chiu
- Department of Materials Science and Engineering, Feng Chia University, Taichung, 40724, Taiwan
| | - Hsia-Yu Lin
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Krishna P Bera
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Mario Hofmann
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Ya-Ping Hsieh
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
- Molecular Science and Technology Program, Taiwan International Graduate Program, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
- Graduate Institute of Applied Physics, National Taiwan University, Taipei, 106, Taiwan
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan
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Mohanta MK, Fathima IS, De Sarkar A. Exceptional mechano-electronic properties in the HfN2 monolayer: a promising candidate in low-power flexible electronics, memory devices and photocatalysis. Phys Chem Chem Phys 2020; 22:21275-21287. [DOI: 10.1039/d0cp02999h] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The response of the electronic properties of the HfN2 monolayer to external perturbation such as strain and electric fields has been investigated using density functional theory calculations for its device-based applications and photocatalysis.
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