PMID- 30969364
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20191023
LR  - 20200310
IS  - 1436-5073 (Electronic)
IS  - 0026-3672 (Linking)
VI  - 186
IP  - 5
DP  - 2019 Apr 10
TI  - Ratiometric determination of hydrogen peroxide based on the size-dependent green 
      and red fluorescence of CdTe quantum dots capped with 3-mercaptopropionic acid.
PG  - 277
LID - 10.1007/s00604-019-3390-0 [doi]
AB  - A ratiometric fluorescent nanoprobe is described for the detection of H(2)O(2). 
      It is based on the use of a mixture of green-emitting CdTe quantum dots (GQDs) 
      and red-emitting CdTe QDs (RQDs). The two kinds of QDs have different size and 
      different fluorescence response towards H(2)O(2). The ratio of the emission 
      intensities at 606 and 510 nm (under 365 nm photoexcitation) can be used as the 
      analytical information. Even without any chemical modification of the surface of 
      the QDs, the probe display high sensitivity and selectivity for H(2)O(2). The 
      fluorescence of small QDs is more effectively quenched by H(2)O(2). Stern-Volmer 
      analysis showed both static and dynamic quenching to occur. The probe works well 
      in the 10~125 muM H(2)O(2) concentration range and has a 0.3 muM detection limit 
      (3sigma/slope). Graphical abstract Schematic presentation of the ratiometric 
      fluorescent nanoprobe composed of green-emitting and red-emitting CdTe QDs. lambda, I, 
      and k are the emission wavelength, emission intensity, and quenching/enhancement 
      coefficient, respectively. The subscript 0 and 1 present the green-emitting and 
      red-emitting CdTe QDs, respectively.
FAU - Wang, Yongbo
AU  - Wang Y
AD  - School of Food and Biological Engineering, Shaanxi University of Science and 
      Technology, Xi'an, 710021, People's Republic of China. ybwang@sust.edu.cn.
FAU - Yang, Min
AU  - Yang M
AD  - School of Chemical Engineering, Northwest University, Xi'an, 710069, People's 
      Republic of China.
FAU - Ren, Yingkun
AU  - Ren Y
AD  - School of Chemical Engineering, Northwest University, Xi'an, 710069, People's 
      Republic of China.
FAU - Fan, Jun
AU  - Fan J
AD  - School of Chemical Engineering, Northwest University, Xi'an, 710069, People's 
      Republic of China.
LA  - eng
GR  - 21476183/National Natural Science Foundation of China/International
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20190410
PL  - Austria
TA  - Mikrochim Acta
JT  - Mikrochimica acta
JID - 7808782
SB  - IM
OTO - NOTNLM
OT  - Binary QD systems
OT  - Biomarkers
OT  - Fluorescence intensity ratios
OT  - Fluorescent detection
OT  - Quenching efficiency
OT  - Quenching mechanism
OT  - Ratiometric fluorescent nanoprobe
OT  - Real samples
OT  - Stern-Volmer plot
EDAT- 2019/04/11 06:00
MHDA- 2019/04/11 06:01
CRDT- 2019/04/11 06:00
PHST- 2018/12/05 00:00 [received]
PHST- 2019/03/29 00:00 [accepted]
PHST- 2019/04/11 06:00 [entrez]
PHST- 2019/04/11 06:00 [pubmed]
PHST- 2019/04/11 06:01 [medline]
AID - 10.1007/s00604-019-3390-0 [pii]
AID - 10.1007/s00604-019-3390-0 [doi]
PST - epublish
SO  - Mikrochim Acta. 2019 Apr 10;186(5):277. doi: 10.1007/s00604-019-3390-0.