Optical detection of choline and acetylcholine based on H2O2-sensitive quantum dots

2011 ◽  
Vol 28 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Zhenzhen Chen ◽  
Xiangling Ren ◽  
Xianwei Meng ◽  
Dong Chen ◽  
Chuanmiao Yan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Detection

Optical detection of glucose by CdS quantum dots immobilized in smart microgels

2009 ◽  
pp. 4390 ◽  
Author(s):  
Weitai Wu ◽  
Ting Zhou ◽  
Jing Shen ◽  
Shuiqin Zhou
Keyword(s):  
Quantum Dots ◽  
Optical Detection ◽  
Cds Quantum Dots

scholarly journals Highly sensitive surface plasmon resonance optical detection of ferric ion using CTAB/hydroxylated graphene quantum dots thin film

2020 ◽  
Vol 128 (8) ◽  
pp. 083105
Author(s):  
Nur Ain Asyiqin Anas ◽  
Yap Wing Fen ◽  
Nor Azah Yusof ◽  
Nur Alia Sheh Omar ◽  
Wan Mohd Ebtisyam Mustaqim Mohd Daniyal ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Optical Detection ◽  
Graphene Quantum Dots ◽  
Ferric Ion ◽  
Highly Sensitive

Optical Detection of the Pesticide by Functionalized Quantum Dots as Fluorescence-Based Biosensor

2011 ◽  
Vol 495 ◽  
pp. 314-318 ◽  
Author(s):  
Nguyen Ngoc Hai ◽  
Vu Duc Chinh ◽  
Tran Kim Chi ◽  
Ung Thi Dieu Thuy ◽  
Nguyen Xuan Nghia ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Detection ◽  
Thick Shell ◽  
Study Results ◽  
Pl Intensity ◽  
Best Fit

In this work, the results on using biosensor composed from quantum dots as transducer and acetylcholinesterase enzymes (AChE) to detect pesticides optically are presented. The used quantum dots were CdTe, CdSe/ZnS 10 monolayer (ML) and CdSe/ZnSe2ML/ZnS 8 ML – the brand new thick-shell quantum dots (QD). The study results pointed out that the CdSe/ZnS 10 ML and CdSe/ZnSe 2ML/ZnS 8ML quantum dots best fit for the role of transducers in biosensors. In the biosensor, acetylthiocholine (ATCh) is used as indicator for the AChE enzymes to work, since it is a very powerful hydrolyte with the presence of AChE enzymes. Moreover, the organophosphorus (OP) pesticides are the inhibitors for the AChE enzymes, thus, by the biosensors that we designed, we can detect pesticides by the change in photoluminescence (PL) intensity of QDs, with the detection of OP like parathion methyl is 0.05 ppm, and acetamiprid is 2.5 ppm.

Ultrasensitive optical detection of anions by quantum dots

2016 ◽  
Vol 1 (2) ◽  
pp. 125-134 ◽  
Author(s):  
Yongbing Lou ◽  
Yixin Zhao ◽  
Jun-Jie Zhu
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Optical Detection

A review about ultrasensitive optical detection of anions by quantum dots in aqueous solution or in vivo.

Optical Detection of the Charging of InAs Quantum Dots with Different Backgate Configurations

2002 ◽  
Vol 737 ◽  
Author(s):  
B. Su ◽  
L. Karsten ◽  
C. Schüller ◽  
D. Heitmann ◽  
A. A. Zhukov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Detection ◽  
The Other ◽  
Inas Quantum Dots ◽  
Hole Capture ◽  
Self Assembled ◽  
Electron Occupation

ABSTRACTWe investigate self-assembled InAs quantum dots by photoluminescence (PL) and capacitance spectroscopies. By employing specially designed backelectrode configurations, we can control the number of electrons, which are confined in the quantum dots. With PL experiments we study the dependence of the s-s transition on the electron occupation of the quantum dots. We observe a characteristic redshift of the s-s transition when the s-shell is filled with electrons. However, if the p-shell of the quantum dots starts to fill, the samples with different backelectrode configurations show a different behavior. In one type of samples, the signal stays redshifted, while in the other it blueshifts again. The effect can be explained by different hole capture processes in both types of samples.

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