Fabrication and characterization of novel cRGD modified graphene quantum dots for chemo-photothermal combination therapy

2020 ◽  
Vol 309 ◽  
pp. 127732 ◽  
Author(s):  
Chen Wang ◽  
Yu Chen ◽  
Zhizhong Xu ◽  
Binbin Chen ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Combination Therapy ◽  
Graphene Quantum Dots ◽  
Fabrication And Characterization ◽  
Modified Graphene

Fabrication and characterization of p-channel Si double quantum dots

2014 ◽  
Vol 105 (11) ◽  
pp. 113110 ◽  
Author(s):  
Ko Yamada ◽  
Tetsuo Kodera ◽  
Tomohiro Kambara ◽  
Shunri Oda
Keyword(s):  
Quantum Dots ◽  
Double Quantum ◽  
Double Quantum Dots ◽  
Fabrication And Characterization

L-cysteine functionalized graphene quantum dots for sub-ppb detection of As (III)

2021 ◽  
Author(s):  
Md. Farhan Naseh ◽  
Neelam Singh ◽  
Jamilur R. Ansari ◽  
Ashavani Kumar ◽  
Tapan Sarkar ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Quantum Dots ◽  
Room Temperature ◽  
Graphene Quantum Dots ◽  
Optical Characterization ◽  
Functionalized Graphene ◽  
Transmission Electron ◽  
Sensitivity And Selectivity ◽  
Structural Characterizations

Abstract Here, we report functionalized graphene quantum dots (GQDs) for the optical detection of arsenic at room temperature. GQDs with the fluorescence of three fundamental colors (red, green, and blue) were synthesized and functionally capped with L-cysteine (L-cys) to impart selectively towards As (III) by exploiting the affinity of L-cys towards arsenite. The optical characterization of GQDs was carried out using UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy, and fluorescence spectrometry and the structural characterizations were performed using transmission electron microscopy. The fluorescence results showed instantaneous quenching in intensity when the GQDs came in contact with As (III) for all test concentrations over a range from 0.025 ppb to 25 ppb, which covers the permissible limit of arsenic in drinking water. The experimental results suggested excellent sensitivity and selectivity towards As (III).

Sign in / Sign up

Export Citation Format

Share Document