Article
Chemistry, Physical
Uri R. Gabinet, Changyeon Lee, Na Kyung Kim, Martin Hulman, Sarah M. Thompson, Cherie R. Kagan, Chinedum O. Osuji
Summary: Molybdenum disulfide nanosheets exhibit anisotropic optical and electronic properties, and their orientation can be controlled to uncover and utilize these properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Mikhail Y. Y. Lukianov, Anna A. A. Rubekina, Julia V. V. Bondareva, Andrey V. V. Sybachin, George D. D. Diudbin, Konstantin I. I. Maslakov, Dmitry G. G. Kvashnin, Olga G. G. Klimova-Korsmik, Evgeny A. A. Shirshin, Stanislav A. A. Evlashin
Summary: The extraordinary properties of two-dimensional materials make them attractive for various applications, especially in optics. In this study, the absorption and luminescent properties of MoS2 exfoliated in the presence of sodium cholate were investigated. The use of shear-assisted liquid-phase exfoliation and sodium cholate as a surfactant resulted in the highest quality MoS2 nanosheets. The photoluminescent properties of MoS2 nanosheets showed slight variations with changes in surfactant concentrations. This work is of practical importance for improving the photoluminescent properties of MoS2 through chemical functionalization.
Article
Chemistry, Multidisciplinary
Hao Wang, Xiaojie Xu, Talgar Shaymurat
Summary: In this study, the grinding-assisted liquid-phase exfoliation method was used to prepare MoS2 nanosheets. The results showed that the use of N-methylpyrrolidone as the grinding solvent resulted in higher sensitivities and faster response and recovery to formaldehyde compared to acetonitrile.
Article
Acoustics
Kevin Synnatschke, Narine Moses Badlyan, Angelika Wrzesi, Guillermo Lozano Onrubia, Anna -Lena Hansen, Stefan Wolff, Hans Tornatzky, Wolfgang Bensch, Yana Vaynzof, Janina Maultzsch, Claudia Backes
Summary: Liquid phase exfoliation (LPE) has been used to successfully fabricate nanosheets from various van der Waals materials. However, it also alters the chemistry of the materials due to increased effective surface area, resulting in enhanced reactivity and accelerated oxidation. To overcome material decomposition, LPE and processing in an inert atmosphere have been developed. In this study, the inert exfoliation of the oxidation-sensitive van der Waals crystal, CrTe3, was demonstrated.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Honglei Wang, Jiazheng Niu, Jun Shi, Wenzhen Lv, Hongguang Wang, Peter A. van Aken, Zhonghua Zhang, Runfeng Chen, Wei Huang
Summary: A new exfoliation method using grinding-promoted intercalation exfoliation (GPIE) was presented to prepare MoS2-CNC nanocomposites, which showed impressive performance as anode materials for potassium-ion batteries. The method efficiently exfoliates MoS2 nanosheets and produces the nanocomposites in water, opening up a new avenue for high-performance device applications.
Article
Chemistry, Multidisciplinary
Honglei Wang, Jun Shi, Jingyu Zhang, Zhehao Tao, Hongguang Wang, Qingqing Yang, Peter A. van Aken, Runfeng Chen
Summary: This study presents a facile and green method for preparing few-layer MoS2 nanosheets and nanocomposites, and demonstrates their potential in high-performance memory devices. The findings reveal the charge trapping and detrapping behaviors of the 2D MoS2-based nanocomposites.
Article
Materials Science, Ceramics
Shahram Shaybanizadeh, Alireza Najafi Chermahini
Summary: Through sonication and heat treatment, we successfully produced BNNSs using a simple, affordable, and high-efficiency method. Various analyses confirmed the structure and properties of the obtained BNNSs.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jiyeon Kim, Changik Im, Chan Lee, Jinwoo Hwang, Hyoik Jang, Jae Hak Lee, Minho Jin, Haeyeon Lee, Junyoung Kim, Junho Sung, Youn Sang Kim, Eunho Lee
Summary: Recently, the attention on two-dimensional transition metal dichalcogenides (TMDs) like molybdenum disulfide (MoS2) has increased due to their unique properties. To modulate the electronic properties and structure of TMDs, controlling chalcogenide vacancies is crucial, but existing methods have limitations such as plasma damage. In this study, a novel solvent-assisted vacancy engineering (SAVE) method was introduced to precisely control sulfur vacancies in MoS2. The non-destructive and scalable SAVE method can expand its application in memory devices and provide insights into charge transport mechanisms.
NANOSCALE HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Shweta, Vinamrita Singh, Kaushal Kumar, Sridharbabu Yarramaneni, Arun Kumar
Summary: Ultrathin molybdenum disulfide (MoS2) nanosheets were successfully prepared via grinding-assisted liquid phase exfoliation. The processing parameters were optimized for efficient and scalable production of MoS2 nanosheets. The synthesized MoS2 exhibited a bandgap above 2.0 eV and a lower difference between in-plane and out-of-plane vibration modes compared to the bulk sample. Grinding-assisted sonication in NMP solvent was found to be the most efficient method for producing low-dimensional nanosheets. The well dispersed MoS2 nanoflakes can be blended with other nanomaterials for optoelectronic applications.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Acoustics
Yuxin Yan, Sivakumar Manickam, Edward Lester, Tao Wu, Cheng Heng Pang
Summary: This study proposes an effective, sustainable and scalable ultrasound-assisted mechano-chemical cracking method to produce graphene oxide using miscanthus as a carbon precursor. The results show that the method can produce good quality and uniform graphene oxide, with potential for producing various graphene materials via a single-step method.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Physical
Jiye Li, Wen Yun, Hua Zhang, Ligang Chen, Ho-Pui Ho, Xiaoyin Pu, Yu Huang, Yu Shen, Haiyan Cao
Summary: This study investigates the aggregation behavior of large-scale two-dimensional molybdenum disulfide (MoS2) nanosheets prepared by sonication-assisted exfoliation in an environmentally friendly ethanol/water mixture for biological sensing application. It is found that adjusting sonication time and centrifuging speed allows for the selection of MoS2 nanosheets with different concentrations and sizes. Higher concentrations of salt and cations with higher valence promote the aggregation and settling of MoS2 nanosheets due to the perturbation of attractive van der Waals forces and repulsive Coulombic interactions. Additionally, the introduction of Escherichia coli O157:H7 (E. coli O157:H7) aptamer functionalized MoS2 nanosheets and salt results in a colorimetric sensor with a linear relationship between the change in extinction of MoS2 nanosheets and E. coli O157:H7 concentration.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Physics, Applied
S. E. Panasci, E. Schiliro, F. Migliore, M. Cannas, F. M. Gelardi, F. Roccaforte, F. Giannazzo, S. Agnello
Summary: The study demonstrates significant differences in the vibrational and light emission properties of MoS2 membranes exfoliated on Au compared to Al2O3, with these differences decreasing as the number of MoS2 layers increases.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Eunseo Cho, Anh Thi Nguyen, Seoyeong Lim, Jungyoon Cho, Jungeun Song, Soyeong Kwon, Dong-Wook Kim
Summary: It is found that the apparent colors of WS2/Au and WS2/Ag strongly depend on the underlying metal layers as well as the number of layers in WS2. The absorption of WS2/Au and WS2/Ag is calculated, and the maximum absorption of WS2/Ag is much larger than that of WS2/Au. The resonant modes in WS2/Au and WS2/Ag can explain how the number of layers in WS2 and the metal layer affect the optical characteristics of the structures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Runqiu Wang, Shuai Guo, Zhonglin Li, Dieter Weller, Sufeng Quan, Jing Yu, Mengxuan Wu, Jie Jiang, Yingying Wang, Ruibin Liu
Summary: MoS2 nanoscrolls demonstrate strong anisotropic optical properties, making them a promising candidate for the fabrication of multifunctional devices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
L. Seravalli, M. Bosi, P. Fiorenza, S. E. Panasci, D. Orsi, E. Rotunno, L. Cristofolini, F. Rossi, F. Giannazzo, F. Fabbri
Summary: The use of gold nanoparticles in the chemical vapor deposition growth of two-dimensional molybdenum disulfide has been shown to influence the synthesis of large monolayer MoS2 flakes, as well as modify the optical and electronic properties of MoS2 triangular domains. This suggests a potential method for localized synthesis of two-dimensional materials with improved properties.
NANOSCALE ADVANCES
(2021)