Enhancing Nonradiative Energy Transfer between Nitridized Carbon Quantum Dots and Monolayer WS2

2019 ◽  
Vol 123 (41) ◽  
pp. 25456-25463
Author(s):  
Weitao Su ◽  
Jiake Li ◽  
Fei Chen ◽  
Li Fu ◽  
Su Ding ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Carbon Quantum Dots ◽  
Nonradiative Energy Transfer

FRET Study Between Carbon Quantum Dots and Malachite Green by Steady-State and Time-Resolved Fluorescence Spectroscopy

2020 ◽  
Vol 10 (3) ◽  
pp. 178-188
Author(s):  
Bipin Rooj ◽  
Ankita Dutta ◽  
Debojyoti Mukherjee ◽  
Sahidul Islam ◽  
Ujjwal Mandal
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Fluorescence Spectroscopy ◽  
Malachite Green ◽  
Dye Degradation ◽  
Fluorescence Emission ◽  
Carbon Quantum Dots ◽  
Time Resolved Fluorescence ◽  
Physical Processes ◽  
Time Resolved

Background: Understanding the interaction between different organic dyes and carbon quantum dots helps us to understand several photo physical processes like electron transfer, energy transfer, molecular sensing, drug delivery and dye degradation processes etc. Objective: The primary objective of this study is to whether the carbon quantum dots can act as an electron donor and can participate in the different photo physical processes. Methods: In this work, Carbon Quantum Dots (CQDLs) are synthesized in most economical and simple carbonization method where petals of Nelumbo nucifera L. are used as a carbon precursor. The synthesized CQDLs were characterized by using experimental techniques like UV−Vis absorption, FT-IR, Transmission Electron Microscopy (TEM), steadystate and time-resolved fluorescence spectroscopy. Results: The spectral analysis shows that the so synthesized CQDLs are spherical in shape and its diameter is around 4.2 nm. It shows the fluorescence emission maximum at 495 nm with a quantum yield of 4%. In this work the interaction between Carbon Quantum Dots (CQDLs) and an organic dye Malachite Green (MG) is studied using fluorescence spectroscopic technique under ambient pH condition (At pH 7). The quenching mechanism of CQDLs with MG was investigated using Stern-Volmer equation and time-resolved fluorescence lifetime studies. The results show that the dominant process of fluorescence quenching is attributed to Forster Resonance Energy Transfer (FRET) having a donor acceptor distance of 53 Å where CQDLs act as a donor and MG acts as an acceptor. Conclusion: This work has a consequence that CQDLs can be used as a donor species for different photo physical processes such as photovoltaic cell, dye sensitized solar cell, and also for antioxidant activity study.

scholarly journals Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots

2012 ◽  
Vol 100 (24) ◽  
pp. 241109 ◽  
Author(s):  
Sedat Nizamoglu ◽  
Pedro Ludwig Hernández-Martínez ◽  
Evren Mutlugun ◽  
Durmus Ugur Karatay ◽  
Hilmi Volkan Demir
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Quantum Well ◽  
Near Field ◽  
Nonradiative Energy Transfer ◽  
Energy Gradient

scholarly journals Excitonic enhancement of nonradiative energy transfer to bulk silicon with the hybridization of cascaded quantum dots

2013 ◽  
Vol 103 (26) ◽  
pp. 261103 ◽  
Author(s):  
Aydan Yeltik ◽  
Burak Guzelturk ◽  
Pedro Ludwig Hernandez-Martinez ◽  
Shahab Akhavan ◽  
Hilmi Volkan Demir
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Nonradiative Energy Transfer ◽  
Bulk Silicon
Sign in / Sign up

Export Citation Format

Share Document