Simultaneous exfoliation and colloidal formation of few-layer semiconducting MoS2 sheets in water

2020 ◽  
Vol 56 (13) ◽  
pp. 2035-2038 ◽  
Author(s):  
Xutao Wu ◽  
Yuan Li ◽  
Libo Chen ◽  
Jie Zhao ◽  
Biao Wu ◽  
...  

A simple method allowing for simultaneous liquid-phase exfoliation of MoS2 crystals into few-layer sheets and colloidal formation of the exfoliated sheets is reported.

2015 ◽  
Vol 7 (5) ◽  
pp. 2012-2019 ◽  
Author(s):  
Jafar Abolhasani ◽  
Hamid Reza Jafariyan ◽  
Mohammad Mahdi khataei ◽  
Rahim Hosseinzadeh-khanmiri ◽  
Ebrahim Ghorbani-kalhor ◽  
...  

A simple method was developed for the separation and determination of citalopram enantiomers in urine samples.


2021 ◽  
Vol 31 (17) ◽  
pp. 2010401
Author(s):  
Lingfeng Gao ◽  
Rui Wang ◽  
Artem V. Kuklin ◽  
Han Zhang ◽  
Hans Ågren

2021 ◽  
Author(s):  
Yan-Mei Li ◽  
Chu-Qiao Liang ◽  
Lin Wang ◽  
Yun-Yi Luo ◽  
Qian-Qian Li

We developed a new method for protein droplet visualization by means of a droplet probe (DroProbe) based on an aggregation-induced emission (AIE) fluorogen. A simple method for viscosity comparison of...


Author(s):  
Juliana L. Vidal ◽  
Stephanie M. V. Gallant ◽  
Evan P. Connors ◽  
Douglas D. Richards ◽  
Stephanie L. MacQuarrie ◽  
...  

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1072
Author(s):  
Steffen Ott ◽  
Melanie Lakmann ◽  
Claudia Backes

Liquid phase exfoliation (LPE) is widely used to produce colloidal dispersions of nanomaterials, in particular two-dimensional nanosheets. The degree of exfoliation, i.e., the length to thickness aspect ratio was shown to be intrinsically limited by the ratio of in-plane to out-of-plane binding strength. In this work, we investigate whether simple pretreatment of the starting material can be used to change the in-plane to out-of-plane binding strength through mild intercalation to improve the sample quality in sonication-assisted LPE. Five different pretreatment conditions of WS2 were tested and the dispersions size-selected through centrifugation. From optical spectroscopy (extinction, Raman, photoluminescence), information on nanosheet dimension (average lateral size, layer number, monolayer size) and optical quality (relative photoluminescence quantum yield) was extracted. We find that the pretreatment has a minor impact on the length/thickness aspect ratio, but that photoluminescence quantum yield can be increased in particular using mild sonication conditions. We attribute this to the successful exfoliation of nanosheets with a lower degree of basal plane defectiveness. This work emphasizes the complexity of the exfoliation process and suggests that the role of defects has to be considered for a comprehensive picture.


ACS Photonics ◽  
2018 ◽  
Vol 5 (12) ◽  
pp. 5055-5067 ◽  
Author(s):  
Chenyang Xing ◽  
Xing Chen ◽  
Weichun Huang ◽  
Yufeng Song ◽  
Jihao Li ◽  
...  

2019 ◽  
Vol 19 (4) ◽  
pp. 2078-2086 ◽  
Author(s):  
Yu-Zhou Wang ◽  
Tian Chen ◽  
Hai-Hui Liu ◽  
Xue-Chen Wang ◽  
Xing-Xiang Zhang

2009 ◽  
Vol 19 (23) ◽  
pp. 3680-3695 ◽  
Author(s):  
Jonathan N. Coleman

2D Materials ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 035015 ◽  
Author(s):  
John B Boland ◽  
Ruiyuan Tian ◽  
Andrew Harvey ◽  
Victor Vega-Mayoral ◽  
Aideen Griffin ◽  
...  

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