Tunable UV-visible absorption of SnS2layered quantum dots produced by liquid phase exfoliation

Nanoscale ◽  
2017 ◽  
Vol 9 (5) ◽  
pp. 1820-1826 ◽  
Author(s):  
Xiao Fu ◽  
P. Ilanchezhiyan ◽  
G. Mohan Kumar ◽  
Hak Dong Cho ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Visible Absorption ◽  
Uv Visible ◽  
Liquid Phase Exfoliation

Production of carbon dots during the liquid phase exfoliation of MoS2 quantum dots

Carbon ◽  
2019 ◽  
Vol 155 ◽  
pp. 243-249 ◽  
Author(s):  
Weimin Zhang ◽  
Jinhong Du ◽  
Zhibo Liu ◽  
Dingdong Zhang ◽  
Qinwei Wei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Carbon Dots ◽  
Liquid Phase Exfoliation

Liquid-Phase Exfoliation of Few-Layer Graphene and Effect of Sonication Time on Concentration of Produced Few Layer Graphene

2017 ◽  
Vol 14 ◽  
pp. 17-24 ◽  
Author(s):  
Syed Sajid Ali Shah ◽  
Habib Nasir
Keyword(s):  
Liquid Phase ◽  
Cost Effective ◽  
Production Method ◽  
Commercial Production ◽  
Sonication Time ◽  
High Concentration ◽  
Layer Graphene ◽  
Uv Visible ◽  
Liquid Phase Exfoliation ◽  
Few Layer Graphene

Although graphene has been produced by various methods at lab scale, however, its cost effective mass production method is still a challenge. Graphene has been produced by liquid phase exfoliation, which is the most probable method for commercial production of graphene for various industrial applications.This paper reports high concentration production of few-layer graphene in DMSO (dimethyl sulfoxide) as solvent through liquid phase exfoliation assisted with sonication. The temperature was kept below 30oC. SEM, AFM, and XRD were used to characterize the produced graphene. SEM results confirm the production of few-layer graphene. EDX analysis shows that the graphene surface is free from oxides and impurities. AFM results also confirm the production of few-layer graphene. The UV-visible spectrophotometer was used to determine the concentration of the produced graphene, and the investigations demonstrate that the graphene production was increased by increasing the sonication time. There exist a linear relationship between the amount of produced graphene and sonication time for supplying energy during sonication.

Ultrasmall Bismuth Quantum Dots: Facile Liquid-Phase Exfoliation, Characterization, and Application in High-Performance UV–Vis Photodetector

ACS Photonics ◽  
2017 ◽  
Vol 5 (2) ◽  
pp. 621-629 ◽  
Author(s):  
Chenyang Xing ◽  
Weichun Huang ◽  
Zhongjian Xie ◽  
Jinlai Zhao ◽  
Dingtao Ma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
High Performance ◽  
Liquid Phase Exfoliation

Size and refinement edge-shape effects of graphene quantum dots on UV–visible absorption

2015 ◽  
Vol 623 ◽  
pp. 186-191 ◽  
Author(s):  
Ruiqiang Zhang ◽  
Shifei Qi ◽  
Jianfeng Jia ◽  
Bryna Torre ◽  
Hao Zeng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Visible Absorption ◽  
Shape Effects ◽  
Uv Visible

scholarly journals Synthesis and Photoluminescence Properties of MoS2/Graphene Hetero-Structure by Liquid Phase Exfoliation

2021 ◽  
Author(s):  
Durai Murugan Kandhasamy ◽  
Paulpandian Muthu Mareeswaran ◽  
Chellappan Selvaraju ◽  
Namasivayam Dhenadhayalan
Keyword(s):  
Liquid Phase ◽  
Radiative Decay ◽  
Photophysical Properties ◽  
Water Mixture ◽  
Hetero Structure ◽  
Enhanced Photoluminescence ◽  
Alcohol Water ◽  
Defect Sites ◽  
Uv Visible ◽  
Liquid Phase Exfoliation

Synthesis of MoS2/Graphene hetero-structure in single stage, liquid-phase exfoliation in 7:3 isopropyl alcohol /water mixture and its consequences on the photoluminescence behavior of MoS2 have been studied. Thus synthesized hetero-structure was characterized using UV-visible, micro-Raman spectroscopy, Transmission electron microscopy(TEM), and Dynamic Light Scattering (DLS) analysis. UV-Visible and micro-Raman analysis confirm improved exfoliation to the level of monolayer hetero-structure. The photophysical properties of the hetero-structure were analyzed using steady state and time resolved luminescence techniques. An enhanced photoluminescence observed in the case of hetero-structure probably due to increase in the defect sites or reduction in the rate of non-radiative decay upon formation of sandwiched hetero-structure. Applications of this hetero-structure for fluorescence live cell imaging carried out and the hetero-structure demonstrated a better luminescence contrast compared to its individual counterpart MoS2 in phosphate buffered saline (PBS).

Graphene quantum dots derived from platelet graphite nanofibers by liquid-phase exfoliation

2014 ◽  
Vol 78 ◽  
pp. 314-319 ◽  
Author(s):  
Yu-Wen Shih ◽  
Guann-Wei Tseng ◽  
Cheng-Yu Hsieh ◽  
Yuan-Yao Li ◽  
Akiyoshi Sakoda
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Graphene Quantum Dots ◽  
Graphite Nanofibers ◽  
Liquid Phase Exfoliation

One-pot liquid-phase exfoliation from graphite to graphene with carbon quantum dots

Nanoscale ◽  
2015 ◽  
Vol 7 (23) ◽  
pp. 10527-10534 ◽  
Author(s):  
Minghan Xu ◽  
Wei Zhang ◽  
Zhi Yang ◽  
Fan Yu ◽  
Yujie Ma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Carbon Quantum Dots ◽  
One Pot ◽  
Liquid Phase Exfoliation

An Unexpected Transformation of Organic Solvents into 2D Fluorescent Quantum Dots during Ultrasonication-Assisted Liquid-Phase Exfoliation

2019 ◽  
Vol 123 (41) ◽  
pp. 25412-25421 ◽  
Author(s):  
Saroj Kumar Das ◽  
Ramchandra Gawas ◽  
Satadru Chakrabarty ◽  
Gunda Harini ◽  
Rishabh Patidar ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Organic Solvents ◽  
Liquid Phase Exfoliation ◽  
Unexpected Transformation
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