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Purbayanto MAK, Bury D, Chandel M, Shahrak ZD, Mochalin VN, Wójcik A, Moszczyńska D, Wojciechowska A, Tabassum A, Naguib M, Jastrzębska AM. Ambient Processed rGO/Ti 3CNT x MXene Thin Film with High Oxidation Stability, Photosensitivity, and Self-Cleaning Potential. ACS APPLIED MATERIALS & INTERFACES 2023; 15:44075-44086. [PMID: 37682978 PMCID: PMC10520912 DOI: 10.1021/acsami.3c07972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 08/28/2023] [Indexed: 09/10/2023]
Abstract
Solution-based processing offers advantages for producing thin films due to scalability, low cost, simplicity, and benignity to the environment. Here, we develop conductive and photoactivated self-cleaning reduced graphene oxide (rGO)/Ti3CNTx MXene thin films via spin coating under ambient conditions. The addition of a thin rGO layer on top of Ti3CNTx resulted in up to 45-fold improvement in the environmental stability of the film compared to the bare Ti3CNTx film. The optimized rGO/Ti3CNTx thin film exhibits an optical transmittance of 74% in the visible region of the spectrum and a sheet resistance of 19 kΩ/sq. The rGO/Ti3CNTx films show high rhodamine B discoloration activity upon light irradiation. Under UV irradiation, the electrically conductive MXene in combination with in situ formed semiconducting titanium oxide induces photogenerated charge carriers, which could potentially be used in photocatalysis. On the other hand, due to film transparency, white light irradiation can bleach the adsorbed dye via photolysis. This study opens the door for using MXene thin films as multifunctional coatings with conductive and potentially self-cleaning properties.
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Affiliation(s)
| | - Dominika Bury
- Faculty
of Materials Science and Engineering, Warsaw
University of Technology, Wołoska 141, Warsaw 02-507, Poland
| | - Madhurya Chandel
- Faculty
of Materials Science and Engineering, Warsaw
University of Technology, Wołoska 141, Warsaw 02-507, Poland
| | - Zhila Dehghan Shahrak
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409 United States
| | - Vadym N. Mochalin
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409 United States
- Department
of Materials Science and Engineering, Missouri
University of Science and Technology, Rolla, Missouri 65409 United States
| | - Anna Wójcik
- Polish
Academy of Sciences, Institute of Metallurgy
and Materials Science, W. Reymonta 25, 30-059 Cracow, Poland
| | - Dorota Moszczyńska
- Faculty
of Materials Science and Engineering, Warsaw
University of Technology, Wołoska 141, Warsaw 02-507, Poland
| | - Anita Wojciechowska
- Faculty
of Materials Science and Engineering, Warsaw
University of Technology, Wołoska 141, Warsaw 02-507, Poland
| | - Anika Tabassum
- Department
of Physics and Engineering Physics, Tulane
University, New Orleans, Louisiana 70118, United States
| | - Michael Naguib
- Department
of Physics and Engineering Physics, Tulane
University, New Orleans, Louisiana 70118, United States
| | - Agnieszka Maria Jastrzębska
- Faculty
of Materials Science and Engineering, Warsaw
University of Technology, Wołoska 141, Warsaw 02-507, Poland
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Shih Y, Li W, Shen J, Chu S, Uen W, Lee H, Lin G, Chen Y, Tu W. Low‐Power Photodetectors Based on PVA Modified Reduced Graphene Oxide Hybrid Solutions. Macromol Rapid Commun 2022; 43:e2100854. [DOI: 10.1002/marc.202100854] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/23/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Yi‐Shan Shih
- Department of Electrical Engineering National Cheng Kung University No.1, University Road Tainan City 701 Taiwan
| | - Wei‐Chen Li
- Department of Electronic Engineering Chung Yuan Christian University No. 200, Chung‐Pei Road, Chungli District Taoyuan City 320 Taiwan
| | - Jun‐Hao Shen
- Department of Electrical Engineering National Cheng Kung University No.1, University Road Tainan City 701 Taiwan
| | - Shao‐Yu Chu
- Department of Electrical Engineering National Cheng Kung University No.1, University Road Tainan City 701 Taiwan
| | - Wu‐Yih Uen
- Department of Electronic Engineering Chung Yuan Christian University No. 200, Chung‐Pei Road, Chungli District Taoyuan City 320 Taiwan
| | - Hsin‐Ying Lee
- Department of Electrical Engineering National Cheng Kung University No.1, University Road Tainan City 701 Taiwan
| | - Gong‐Ru Lin
- Department of Electrical Engineering National Taiwan University No. 1, Sec. 4, Roosevelt Rd. Taipei 10617 Taiwan
| | - Yu‐Cheng Chen
- School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
| | - Wei‐Chen Tu
- Department of Electrical Engineering National Cheng Kung University No.1, University Road Tainan City 701 Taiwan
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Effect of Electrolytic Medium on the Electrochemical Reduction of Graphene Oxide on Si(111) as Probed by XPS. NANOMATERIALS 2021; 12:nano12010043. [PMID: 35009993 PMCID: PMC8747037 DOI: 10.3390/nano12010043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 01/15/2023]
Abstract
The wafer-scale integration of graphene is of great importance in view of its numerous applications proposed or underway. A good graphene–silicon interface requires the fine control of several parameters and may turn into a high-cost material, suitable for the most advanced applications. Procedures that can be of great use for a wide range of applications are already available, but others are to be found, in order to modulate the offer of different types of materials, at different levels of sophistication and use. We have been exploring different electrochemical approaches over the last 5 years, starting from graphene oxide and resulting in graphene deposited on silicon-oriented surfaces, with the aim of understanding the reactions leading to the re-establishment of the graphene network. Here, we report how a proper choice of both the chemical environment and electrochemical conditions can lead to a more controlled and tunable graphene–Si(111) interface. This can also lead to a deeper understanding of the electrochemical reactions involved in the evolution of graphene oxide to graphene under electrochemical reduction. Results from XPS, the most suitable tool to follow the presence and fate of functional groups at the graphene surface, are reported, together with electrochemical and Raman findings.
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Simulation Study on the Effect of Doping Concentrations on the Photodetection Properties of Mg2Si/Si Heterojunction Photodetector. PHOTONICS 2021. [DOI: 10.3390/photonics8110509] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To develop and design an environmentally friendly, low-cost shortwave infrared (SWIR) photodetector (PD) material and extend the optical response cutoff wavelengths of existing silicon photodetectors beyond 1100 nm, high-performance silicon-compatible Mg2Si/Si PDs are required. First, the structural model of the Mg2Si/Si heterojunction was established using the Silvaco Atlas module. Second, the effects of the doping concentrations of Mg2Si and Si on the photoelectric properties of the Mg2Si/Si heterojunction PD, including the energy band, breakdown voltage, dark current, forward conduction voltage, external quantum efficiency (EQE), responsivity, noise equivalent power (NEP), detectivity, on/off ratio, response time, and recovery time, were simulated. At different doping concentrations, the heterojunction energy band shifted, and a peak barrier appeared at the conduction band of the Mg2Si/Si heterojunction interface. When the doping concentrations of Si and Mg2Si layer were 1017, and 1016 cm−3, respectively, the Mg2Si/Si heterojunction PD could obtain optimal photoelectric properties. Under these conditions, the maximum EQE was 70.68% at 800 nm, the maximum responsivity was 0.51 A/W at 1000 nm, the minimum NEP was 7.07 × 10−11 WHz–1/2 at 1000 nm, the maximum detectivity was 1.4 × 1010 Jones at 1000 nm, and the maximum on/off ratio was 141.45 at 1000 nm. The simulation and optimization result also showed that the Mg2Si/Si heterojunction PD could be used for visible and SWIR photodetection in the wavelength range from 400 to 1500 nm. The results also provide technical support for the future preparation of eco-friendly heterojunction photodetectors.
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