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Kimura D, Yotsuya S, Yoshimura T, Fujimura N, Kiriya D. Strong Photoluminescence Enhancement in Molybdenum Disulfide in Aqueous Media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13048-13054. [PMID: 36252205 DOI: 10.1021/acs.langmuir.2c01601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The interface between conventional semiconductors and aqueous ionic solutions is an important target in chemistry and materials science. Recently, a wide variety of research has been done on transition-metal dichalcogenides (TMDCs) for use as 2D layered semiconductors, and their optoelectronic properties have been widely explored. One representative TMDC, monolayer (1L) MoS2, is known to show a photoluminescence (PL) signal of a direct band gap nature, and the PL intensity is dependent on the carrier concentration. Various methods of 1L MoS2 carrier modulation have been shown to enhance the PL intensity in dry environments. In contrast, enhancement in an aqueous environment is limited, and a strategy to design an interface with aqueous media has not yet been established. One proposed idea was an aqueous acid interface; however, the enhancement of the PL with this method was usually minimal, about 1 order of magnitude. In this study, we demonstrate a method to achieve strong PL enhancement in 1L MoS2 in an aqueous media by incorporating bis(trifluoromethane)sulfonyl anion (TFSI- ion) in an acidic environment. With the addition of the TFSI- ion in an acidic environment, the enhancement factor of the PL in 1L MoS2 is more than 100 times greater than its PL intensity in water. The molecular anion is the key factor, as the TFSI- ion facilitates the oxidation of MoS2. This anionic effect is the additional factor needed to modulate the optoelectronic properties of 2D semiconductors in aqueous media. The proposed idea could have potential applications for biochemical sensors in aqueous situations.
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Affiliation(s)
- Daisuke Kimura
- Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
| | - Shotaro Yotsuya
- Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
| | - Takeshi Yoshimura
- Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
| | - Norifumi Fujimura
- Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
| | - Daisuke Kiriya
- Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan
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2
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Electrochemical sensor based on the polyoxometalate nanocluster [(NH4)12[Mo36(NO)4O108(H2O)16]·33H2O and molybdenum disulfide nanocomposite materials for simultaneous detection of dihydroxybenzene isomers. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Tang R, Gong D, Deng Y, Xiong S, Zheng J, Li L, Zhou Z, Su L, Zhao J. π-π stacking derived from graphene-like biochar/g-C 3N 4 with tunable band structure for photocatalytic antibiotics degradation via peroxymonosulfate activation. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:126944. [PMID: 34461536 DOI: 10.1016/j.jhazmat.2021.126944] [Citation(s) in RCA: 53] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 07/31/2021] [Accepted: 08/16/2021] [Indexed: 05/27/2023]
Abstract
The severe pollution caused by antibiotics has raised serious concerns in recent decades. In this study, graphene-like Enteromorpha biochar modified g-C3N4 (BC/CN) was synthesized and applied to degrade tetracycline by activating PMS under visible light, obtaining around 90% removal rate within 1 h. The Enteromorpha biochar can provide electron-withdrawing groups to adjust the electronic structure of g-C3N4, and induces more π-π interaction to decline the recombination of photocarriers. The environmental adaptability of the BC/CN/PMS/vis system was confirmed by the TC degradation in different initial pH, coexisting ions, and natural organic materials. In most cases, the system maintained over 78% degradation rate. The kinetics and mechanism of the system indicating that ∙O2-, 1O2 contributed more to the TC photocatalytic degradation than ∙OH, SO4∙-, and h+. During the process, TC underwent serials hydroxylation, demethylation, and ring-opening processes, and produced more than 40 intermediates in three pathways. Moreover, the BC/CN/PMS/vis system was proved to have at least a 50% degradation rate for more tetracyclines and quinolone antibiotics with the same condition.
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Affiliation(s)
- Rongdi Tang
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
| | - Daoxin Gong
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Yaocheng Deng
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Sheng Xiong
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
| | - Jiangfu Zheng
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
| | - Ling Li
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
| | - Zhanpeng Zhou
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
| | - Long Su
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
| | - Jia Zhao
- College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
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Nguyen DA, Park DY, Duong NT, Lee KN, Im H, Yang H, Jeong MS. Large-Area MoS 2 via Colloidal Nanosheet Ink for Integrated Memtransistor. SMALL METHODS 2021; 5:e2100558. [PMID: 34927977 DOI: 10.1002/smtd.202100558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/24/2021] [Indexed: 06/14/2023]
Abstract
2D transition metal dichalcogenides (TMDs) exhibit intriguing properties for applications in optoelectronics and electronics, among which memtransistors received extensive attention as multifunctional devices. For practical applications of 2D TMDs, large-area fabrication of the materials via reliable processes, which is in trade-off with their quality, has been a long-standing issue. Here, a simple and effective way is proposed to fabricate large-area and high-quality molybdenum disulfide thin films using MoS2 colloidal ink through a spray coating, followed by a postsulfurization process. High-quality MoS2 thin films exhibit excellent optical and electrical properties that can be utilized in field-effect transistors (FETs) and memtransistor arrays. The MoS2 FETs show an average on/off ratio of 5 × 106 and a high electron mobility of 10.34 cm2 V-1 s-1 , which can be understood by the healing of sulfur vacancies, recrystallization, and the removal of the carbon contamination of the MoS2 . These MoS2 -based memtransistors present stable operations with a high switching ratio tuned by back gate and light illumination, which is promising for multiple-levels memory and complex neuromorphic computing. This study demonstrates a new strategy to fabricate 2D TMDs with large-area and high quality for integrated optoelectronic and memory device applications.
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Affiliation(s)
- Duc Anh Nguyen
- Division of Physics and Semiconductor Science, Dongguk University, Seoul, 04620, Republic of Korea
| | - Dae Young Park
- Department of Physics, Department of Energy Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Ngoc Thanh Duong
- Faculty of Materials Science and Engineering, Phenikaa University, Hanoi, 12116, Viet Nam
| | - Kang-Nyeoung Lee
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Hyunsik Im
- Division of Physics and Semiconductor Science, Dongguk University, Seoul, 04620, Republic of Korea
| | - Heejun Yang
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Mun Seok Jeong
- Department of Physics, Department of Energy Engineering, Hanyang University, Seoul, 04763, Republic of Korea
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5
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Wang Z, Cao Q, Sotthewes K, Hu Y, Shin HS, Eigler S. Interlayer electron modulation in van der Waals heterostructures assembled by stacking monolayer MoS 2 onto monolayer graphene with different electron transfer ability. NANOSCALE 2021; 13:15464-15470. [PMID: 34505854 DOI: 10.1039/d1nr03708k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Achieving tunable optoelectronic properties and clarifying interlayer interactions are key challenges in the development of 2D heterostructures. Herein, we report the feasible modulation of the optoelectronic properties of monolayer MoS2 (1L-MoS2) on three different graphene monolayers with varying ability in extracting electrons. Monolayer oxygen-functionalized graphene (1L-oxo-G, a high amount of oxygen of 60%) with a work function (WF) of 5.67 eV and its lowly oxidized reduction product, namely reduced-oxo-G (1L-r-oxo-G, a low amount of oxygen of 0.1%), with a WF of 5.85 eV serving as hole injection layers significantly enhance the photoluminescence (PL) intensity of MoS2, whereas pristine monolayer graphene (1L-G) with a work function (WF) of 5.02 eV results in PL quenching of MoS2. The enhancement in the PL intensity is due to increase of neutral exciton recombination. Furthermore, 1L-r-oxo-G/MoS2 exhibited a higher increase (5-fold) in PL than 1L-oxo-G/MoS2 (3-fold). Our research can help modulate the carrier concentration and electronic type of 1L-MoS2 and has promising applications in optoelectronic devices.
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Affiliation(s)
- Zhenping Wang
- Department of Chemistry, Low-Dimensional Carbon and 2D Materials Center, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea.
| | - Qing Cao
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany.
| | - Kai Sotthewes
- Physics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands
| | - Yalei Hu
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany.
| | - Hyeon S Shin
- Department of Chemistry, Low-Dimensional Carbon and 2D Materials Center, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea.
| | - Siegfried Eigler
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany.
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Guo C, Wang C, Sun H, Dai D, Gao H. A simple electrochemical sensor based on rGO/MoS 2/CS modified GCE for highly sensitive detection of Pb(ii) in tobacco leaves. RSC Adv 2021; 11:29590-29597. [PMID: 35479524 PMCID: PMC9040863 DOI: 10.1039/d1ra05350g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 08/16/2021] [Indexed: 11/21/2022] Open
Abstract
High-performance electrode modification materials play a crucial role in improving the sensitivity of sensor detection in electrochemical determination of heavy metals. In this study, a rGO/MoS2/CS nanocomposite modified glassy carbon electrode (GCE) was used to construct a sensitive sensor for detecting lead ions in tobacco leaves. The reduced graphene oxide (rGO) was used to increase the conductivity of the sensor, and the nano-flowered MoS2 could provide a large reaction specific surface area and a certain active site for heavy metal reaction. Chitosan (CS) was used to improve the enrichment ability of heavy metals and increase the electrocatalytic activity of electrode. Thus, an electrochemical sensor with excellent performance in reproducibility, stability and anti-interference ability was established. The stripping behavior of Pb(ii) and the application conditions of the sensor were studied by square wave anodic stripping voltammetry (SWASV). The investigation indicated that the sensor exhibited high detection sensitivity in the range of 0.005-0.05-2.0 μM, and the limit of detection (LOD) was 0.0016 μM. This work can provide a fast and effective method for determination of Pb(ii) in samples with low content, such as tobacco leaves.
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Affiliation(s)
- Chuanen Guo
- Judicial Expertise Center, Shandong University of Political Science and Law Jinan 250014 P. R. China
| | - Chengxiang Wang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Qingdao University of Science & Technology Qingdao 266042 P. R. China +86-0532-84022990 +86-0532-84022990
| | - Hongyan Sun
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Qingdao University of Science & Technology Qingdao 266042 P. R. China +86-0532-84022990 +86-0532-84022990
| | - Dongmei Dai
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Qingdao University of Science & Technology Qingdao 266042 P. R. China +86-0532-84022990 +86-0532-84022990
| | - Hongtao Gao
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Qingdao University of Science & Technology Qingdao 266042 P. R. China +86-0532-84022990 +86-0532-84022990
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7
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Amsterdam SH, Marks TJ, Hersam MC. Leveraging Molecular Properties to Tailor Mixed-Dimensional Heterostructures beyond Energy Level Alignment. J Phys Chem Lett 2021; 12:4543-4557. [PMID: 33970639 DOI: 10.1021/acs.jpclett.1c00799] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The surface sensitivity and lack of dielectric screening in two-dimensional (2D) materials provide numerous intriguing opportunities to tailor their properties using adsorbed π-electron organic molecules. These organic-2D mixed-dimensional heterojunctions are often considered solely in terms of their energy level alignment, i.e., the relative energies of the frontier molecular orbitals versus the 2D material conduction and valence band edges. While this simple model is frequently adequate to describe doping and photoinduced charge transfer, the tools of molecular chemistry enable additional manipulation of properties in organic-2D heterojunctions that are not accessible in other solid-state systems. Fully exploiting these possibilities requires consideration of the details of the organic adlayer beyond its energy level alignment, including hybridization and electrostatics, molecular orientation and thin-film morphology, nonfrontier orbitals and defects, excitonic states, spin, and chirality. This Perspective explores how these relatively overlooked molecular properties offer unique opportunities for tuning optical and electronic characteristics, thereby guiding the rational design of organic-2D mixed-dimensional heterojunctions with emergent properties.
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Affiliation(s)
- Samuel H Amsterdam
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Tobin J Marks
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
- Department of Materials Science and Engineering and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Mark C Hersam
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
- Department of Materials Science and Engineering and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
- Applied Physics Program, Northwestern University, Evanston, Illinois 60208, United States
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, United States
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8
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Hao Q, Liu J, Wang G, Chen J, Gan H, Zhu J, Ke Y, Chai Y, Lin J, Zhang W. Surface-Modified Ultrathin InSe Nanosheets with Enhanced Stability and Photoluminescence for High-Performance Optoelectronics. ACS NANO 2020; 14:11373-11382. [PMID: 32809802 DOI: 10.1021/acsnano.0c03556] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Indium selenide (InSe) has become a research hotspot because of its favorable carrier mobility and thickness-tunable band gap, showing great application potential in high-performance optoelectronic devices. The trend of miniaturization in optoelectronics has forced the feature sizes of the electronic components to shrink accordingly. Therefore, atomically thin InSe crystals may play an important role in future optoelectronics. Given the instability and ultralow photoluminescent (PL) emission of mechanically exfoliated ultrathin InSe, synthesis of highly stable mono- and few-layer InSe nanosheets with high PL efficiency has become crucial. Herein, ultrathin InSe nanosheets were prepared via thermal annealing of electrochemically intercalated products from bulk InSe. The size and yield of the as-prepared nanosheets were up to ∼160 μm and ∼70%, respectively, and ∼80% of the nanosheets were less than five layer. Impressively, the as-prepared nanosheets showed greatly enhanced stability and PL emission because of surface modification by carbon species. Efficient photoresponsivity of 2 A/W was achieved in the as-prepared nanosheet-based devices. These nanosheets were further assembled into large-area thin films with photoresponsivity of 16 A/W and an average Hall mobility of about 5 cm2 V-1 s-1. Finally, one-dimensional (1D) InSe nanoscrolls with a length up to 90 μm were constructed by solvent-assisted self-assembly of the exfoliated nanosheets.
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Affiliation(s)
- Qiaoyan Hao
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Shenzhen University, Shenzhen 518060, China
| | - Jidong Liu
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Shenzhen University, Shenzhen 518060, China
| | - Gang Wang
- Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jiewei Chen
- Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Haibo Gan
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Shenzhen University, Shenzhen 518060, China
| | - Jiaqi Zhu
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Shenzhen University, Shenzhen 518060, China
| | - Yuxuan Ke
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Shenzhen University, Shenzhen 518060, China
| | - Yang Chai
- Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Junhao Lin
- Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Wenjing Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Shenzhen University, Shenzhen 518060, China
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Su WYS, Santiago SRMS, Chiang Hsieh CC, Wu CB, Wang JS, Chiu KC, Shen JL, Huang CY, Chen CY. Enhanced photoluminescence of InGaAs/AlGaAs quantum well with tungsten disulfide quantum dots. NANOTECHNOLOGY 2020; 31:225703. [PMID: 32050176 DOI: 10.1088/1361-6528/ab758a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The pristine and diethylenetriamine (DETA)-doped tungsten disulfide quantum dots (WS2 QDs) with an average lateral size of about 5 nm have been synthesized using pulsed laser ablation (PLA). Introduction of the synthesized WS2 QDs on the InGaAs/AlGaAs quantum wells (QWs) can improve the photoluminescence (PL) of the InGaAs/AlGaAs QW as high as 6 fold. On the basis of the time-resolved PL and Kelvin probe measurements, the PL enhancement is attributed to the carrier transfer from the pristine or DETA-doped WS2 QDs to the InGaAs/AlGaAs QW. A heterostructure band diagram is proposed for explaining the carrier transfer, which increases the hole densities in the QW and enhances its PL intensity. This study is expected to be beneficial for the development of the InGaAs-based optoelectronic devices.
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Affiliation(s)
- Wilson Yeung-Sy Su
- Department of Physics and Center for Nanotechnology, Chung Yuan Christian University, Chung-Li, Taiwan
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Zhang H, Su J, Zhao K, Chen L. Recent Advances in Metal‐Organic Frameworks and Their Derived Materials for Electrocatalytic Water Splitting. ChemElectroChem 2020. [DOI: 10.1002/celc.202000136] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Heng Zhang
- School of Materials Science and EngineeringKunming University of Science and Technology Kunming, Yunnan 650093 P.R. China
- Ningbo Institute of Materials Technology & EngineeringChinese Academy of Sciences Ningbo, Zhejiang 315201 P.R. China
| | - Jianwei Su
- Ningbo Institute of Materials Technology & EngineeringChinese Academy of Sciences Ningbo, Zhejiang 315201 P.R. China
- University of Chinese Academy of Sciences Beijing 100049 P.R. China
| | - Kunyu Zhao
- School of Materials Science and EngineeringKunming University of Science and Technology Kunming, Yunnan 650093 P.R. China
| | - Liang Chen
- Ningbo Institute of Materials Technology & EngineeringChinese Academy of Sciences Ningbo, Zhejiang 315201 P.R. China
- University of Chinese Academy of Sciences Beijing 100049 P.R. China
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11
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Tao Y, Koh SW, Yu X, Wang C, Liang H, Zhang Y, Li H, Wang QJ. Surface group-modified MXene nano-flake doping of monolayer tungsten disulfides. NANOSCALE ADVANCES 2019; 1:4783-4789. [PMID: 36133140 PMCID: PMC9417804 DOI: 10.1039/c9na00395a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 10/07/2019] [Indexed: 05/10/2023]
Abstract
Exciton/trion-involved optoelectronic properties have attracted exponential amount of attention for various applications ranging from optoelectronics, valleytronics to electronics. Herein, we report a new chemical (MXene) doping strategy to modulate the negative trion and neutral exciton for achieving high photoluminescence yield of atomically thin transition metal dichalcogenides, enabled by the regulation of carrier densities to promote electron-bound trion-to-exciton transition via charge transfer from TMDCs to MXene. As a proof of concept, the MXene nano-flake-doped tungsten disulfide is demonstrated to obtain an enhanced PL efficiency of up to ∼five folds, which obviously exceeds the reported efficiency upon electrical and/or plasma doping strategies. The PL enhancement degree can also be modulated by tuning the corresponding surface functional groups of MXene nano-flakes, reflecting that the electron-withdrawing functional groups play a vital role in this charge transfer process. These findings offer promising clues to control the optoelectronic properties of TMDCs and expand the scope of the application of MXene nano-flakes, suggesting a possibility to construct a new heterostructure junction based on MXenes and TMDCs.
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Affiliation(s)
- Ye Tao
- Centre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering, The Photonics Institute, Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
| | - See Wee Koh
- School of Mechanical and Aerospace Engineering, Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
| | - Xuechao Yu
- Centre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering, The Photonics Institute, Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
| | - Chongwu Wang
- Centre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering, The Photonics Institute, Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
| | - Houkun Liang
- Singapore Institute of Manufacturing Technology 71 Nanyang Drive 638075 Singapore
| | - Ying Zhang
- Singapore Institute of Manufacturing Technology 71 Nanyang Drive 638075 Singapore
| | - Hong Li
- School of Mechanical and Aerospace Engineering, Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
| | - Qi Jie Wang
- Centre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering, The Photonics Institute, Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
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12
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Sun YF, Sun JH, Wang J, Pi ZX, Wang LC, Yang M, Huang XJ. Sensitive and anti-interference stripping voltammetry analysis of Pb(II) in water using flower-like MoS2/rGO composite with ultra-thin nanosheets. Anal Chim Acta 2019; 1063:64-74. [DOI: 10.1016/j.aca.2019.03.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 12/14/2022]
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13
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Fabrication of Stacked MoS 2 Bilayer with Weak Interlayer Coupling by Reduced Graphene Oxide Spacer. Sci Rep 2019; 9:5900. [PMID: 30976032 PMCID: PMC6459906 DOI: 10.1038/s41598-019-42446-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/01/2019] [Indexed: 11/09/2022] Open
Abstract
We fabricated the stacked bilayer molybdenum disulfide (MoS2) by using reduced graphene oxide (rGO) as a spacer for increasing the optoelectronic properties of MoS2. The rGO can decrease the interlayer coupling between the stacked bilayer MoS2 and retain the direct band gap property of MoS2. We observed a twofold enhancement of the photoluminescence intensity of the stacked MoS2 bilayer. In the Raman scattering, we observed that the E12g and A1g modes of the stacked bilayer MoS2 with rGO were further shifted compared to monolayer MoS2, which is due to the van der Waals (vdW) interaction and the strain effect between the MoS2 and rGO layers. The findings of this study will expand the applicability of monolayer MoS2 for high-performance optoelectronic devices by enhancing the optical properties using a vdW spacer.
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Kiriya D, Hijikata Y, Pirillo J, Kitaura R, Murai A, Ashida A, Yoshimura T, Fujimura N. Systematic Study of Photoluminescence Enhancement in Monolayer Molybdenum Disulfide by Acid Treatment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10243-10249. [PMID: 30099877 DOI: 10.1021/acs.langmuir.8b01425] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Monolayer molybdenum disulfide (MoS2) is an atomically thin semiconducting material with a direct band gap. This physical property is attributable to atomically thin optical devices such as sensors, light-emitting devices, and photovoltaic cells. Recently, a near-unity photoluminescence (PL) quantum yield of a monolayer MoS2 was demonstrated via a treatment with a molecular acid, bis(trifluoromethane)sulfonimide (TFSI); however, the mechanism still remains a mystery. Here, we work on PL enhancement of monolayer MoS2 by treatment of Brønsted acids (TFSI and sulfuric acid (H2SO4)) to identify the importance of the protonated environment. In TFSI as an acid, different solvents-1,2-dichloroethane (DCE), acetonitrile, and water-were studied, as they show quite different acidity in solution. All of the solvents showed PL enhancement, and the highest was observed in DCE. This behavior in DCE would be due to the higher acidity than others have. Acids from different anions can also be studied in water as a common solvent. Both TFSI and H2SO4 showed similar PL enhancement (∼4-8 enhancement) at the same proton concentration, indicating that the proton is a key factor to enhance the PL intensity. Finally, we considered another cation, Li+ from Li2SO4, instead of H2SO4, in water. Although Li and H atoms showed similar binding energy on MoS2 from theoretical calculations, Li2SO4 treatment showed little PL enhancement; only coexisting H2SO4 reproduced the enhancement. This study demonstrated the importance of a protonated environment to increase the PL intensity of monolayer MoS2. The study will lead to a solution to achieve high optical quality and to implementation for atomically thin optical devices.
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Affiliation(s)
- Daisuke Kiriya
- Department of Physics and Electronics , Osaka Prefecture University , 1-1 Gakuen-cho , Naka-ku, Sakai-shi , Osaka 599-8531 , Japan
- JST, PRESTO , 4-1-8 Honcho , Kawaguchi , Saitama 332-0012 , Japan
| | | | | | | | - Akihiko Murai
- Department of Physics and Electronics , Osaka Prefecture University , 1-1 Gakuen-cho , Naka-ku, Sakai-shi , Osaka 599-8531 , Japan
| | - Atsushi Ashida
- Department of Physics and Electronics , Osaka Prefecture University , 1-1 Gakuen-cho , Naka-ku, Sakai-shi , Osaka 599-8531 , Japan
| | - Takeshi Yoshimura
- Department of Physics and Electronics , Osaka Prefecture University , 1-1 Gakuen-cho , Naka-ku, Sakai-shi , Osaka 599-8531 , Japan
| | - Norifumi Fujimura
- Department of Physics and Electronics , Osaka Prefecture University , 1-1 Gakuen-cho , Naka-ku, Sakai-shi , Osaka 599-8531 , Japan
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15
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Tang S, Wu W, Zhang S, Ye D, Zhong P, Li X, Liu L, Li YF. Tuning the activity of the inert MoS 2 surface via graphene oxide support doping towards chemical functionalization and hydrogen evolution: a density functional study. Phys Chem Chem Phys 2018; 20:1861-1871. [PMID: 29292808 DOI: 10.1039/c7cp06636h] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The basal plane of MoS2 provides a promising platform for chemical functionalization and the hydrogen evolution reaction (HER); however, its practical utilization remains challenging due to the lack of active sites and its low conductivity. Herein, using first principles simulations, we first proposed a novel and effective strategy for significantly enhancing the activity of the inert MoS2 surface using a graphene oxide (GO) support (MoS2/GOs). The chemical bonding of the functional groups (CH3 and NH2) on the MoS2-GO hybrid is stronger than that in freestanding MoS2 or MoS2-graphene. Upon increasing the oxygen group concentration or introducing N heteroatoms into the GO support, the stability of the chemically functionalized MoS2 is improved. Furthermore, use of GOs to support pristine and defective MoS2 with a S vacancy (S-MoS2) can greatly promote the HER activity of the basal plane. The catalytic activity of S-MoS2 is further enhanced by doping N into GOs; this results in a hydrogen adsorption free energy of almost zero (ΔGH = ∼-0.014 eV). The coupling interaction with the GO substrate reduces the p-type Schottky barrier heights (SBH) of S-MoS2 and modifies its electronic properties, which facilitate charge transfer between them. Our calculated results are consistent with the experimental observations. Thus, the present results open new avenues for the chemical functionalization of MoS2-based nanosheets and HER catalysts.
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Affiliation(s)
- Shaobin Tang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China.
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16
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Hua X, Ma X, Hu J, He H, Xu G, Huang C, Chen X. Controlling electronic properties of MoS2/graphene oxide heterojunctions for enhancing photocatalytic performance: the role of oxygen. Phys Chem Chem Phys 2018; 20:1974-1983. [DOI: 10.1039/c7cp07303h] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The manipulation of the constituents of novel hetero-photocatalysts is an effective method for improving photocatalytic efficiency, but a theoretical understanding of the relationship between interlayer interaction and photocatalytic activity is still lacking.
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Affiliation(s)
- Xiaotian Hua
- School of Science
- Hubei University of Technology
- Wuhan 430068
- China
| | - Xinguo Ma
- School of Science
- Hubei University of Technology
- Wuhan 430068
- China
- Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy
| | - Jisong Hu
- School of Science
- Hubei University of Technology
- Wuhan 430068
- China
| | - Hua He
- School of Science
- Hubei University of Technology
- Wuhan 430068
- China
| | - Guowang Xu
- School of Science
- Hubei University of Technology
- Wuhan 430068
- China
| | - Chuyun Huang
- Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy
- Hubei University of Technology
- Wuhan 430068
- China
| | - Xiaobo Chen
- Department of Chemistry
- University of Missouri-Kansas City
- Kansas City
- USA
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17
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Lee H, Bak S, An SJ, Kim JH, Yun E, Kim M, Seo S, Jeong MS, Lee H. Highly Efficient Thin-Film Transistor via Cross-Linking of 1T Edge Functional 2H Molybdenum Disulfides. ACS NANO 2017; 11:12832-12839. [PMID: 29182846 DOI: 10.1021/acsnano.7b07776] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Thin-film transistors (TFTs) have received great attention for their use in lightweight, large area, and wearable devices. However, low crystalline materials and inhomogeneous film formation limit the realization of high-quality electrical properties for channels in commercial TFTs, especially for flexible electronics. Here, we report a field-effect TFT fabricated via cross-linking of edge-1T basal-2H MoS2 sheets that are prepared by edge functional exfoliation of bulk MoS2 with soft organic exfoliation reagents. For edge functional exfoliation, the electrophilic 4-carboxy-benzenediazonium used as the soft organic reagent attacks the nucleophilic thiolates exposed at the edge of the bulk MoS2 with the help of an amine catalyst, resulting in 1T edge-functional HOOC-benzene-2H basal MoS2 nanosheets (e-MoS2). The cross-linking via hydrogen bonding of the negatively charged HOOC of the e-MoS2 sheets with the help of a cationic polymer, polydiallyldimethylammonium chloride, results in a good film formation for a channel of the solution processing TFT. The TFT exhibits an extremely high mobility of 170 cm2/(V s) at 1 V (on/off ratio of 106) on SiO2/Si substrate and also a high mobility of 36.34 cm2/(V s) (on/off ratio of 103) on PDMS/PET substrate.
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Affiliation(s)
- Hanleem Lee
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
| | - Sora Bak
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
| | - Sung-Jin An
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
| | - Jung Ho Kim
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
| | - Eunbhin Yun
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
| | - Meeree Kim
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
| | - Sohyeon Seo
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
| | - Mun Seok Jeong
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
| | - Hyoyoung Lee
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), ‡Department of Chemistry, and §Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea
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18
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Zhang L, Zhao K, Yu R, Yan M, Xu W, Dong Y, Ren W, Xu X, Tang C, Mai L. Phosphorus Enhanced Intermolecular Interactions of SnO 2 and Graphene as an Ultrastable Lithium Battery Anode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603973. [PMID: 28371218 DOI: 10.1002/smll.201603973] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 02/15/2017] [Indexed: 06/07/2023]
Abstract
SnO2 suffers from fast capacity fading in lithium-ion batteries due to large volume expansion as well as unstable solid electrolyte interphase. Herein, the design and synthesis of phosphorus bridging SnO2 and graphene through covalent bonding are demonstrated to achieve a robust structure. In this unique structure, the phosphorus is able to covalently "bridge" graphene and tin oxide nanocrystal through PC and SnOP bonding, respectively, and act as a buffer layer to keep the structure stable during charging-discharging. As a result, when applied as a lithium battery anode, SnO2 @P@GO shows very stable performance and retains 95% of 2nd capacity onward after 700 cycles. Such unique structural design opens up new avenues for the rational design of other high-capacity materials for lithium battery, and as a proof-of-concept, creates new opportunities in the synthesis of advanced functional materials for high-performance energy storage devices.
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Affiliation(s)
- Lei Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Kangning Zhao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Ruohan Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Mengyu Yan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Wangwang Xu
- Deparment of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA, 70830, USA
| | - Yifan Dong
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Wenhao Ren
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Xu Xu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Chunjuan Tang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Liqiang Mai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
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