NDLI: Determination of total aflatoxin using cysteamine-capped CdS quantum dots as a fluorescence probe

Content Provider	Springer Nature Link
Author	Tayebi, Mahush Tavakkoli Yaraki, Mohammad Ahmadieh, Mahnaz Tahriri, Mohammadreza Vashaee, Daryoosh Tayebi, Lobat
Copyright Year	2016
Abstract	Aflatoxins form a class of potent carcinogens that contaminate a wide range of food products and can be fatal to humans and livestock. We have designed cysteamine-capped CdS quantum dots (QDs) to serve as aflatoxin photodetectors for use in agricultural industries. Water-soluble CdS QDs are synthesized through growth in a poly(vinyl alcohol) matrix using a chemical precipitation method. The prepared QDs are then characterized with X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS), and transmission electron microscopy (TEM) analyses. The obtained results revealed that these CdS QDs have a 1- to 2-nm crystalline size, hexagonal wurtzite structure, and spherical morphology with a diameter less than 10 nm. Photoluminescence spectroscopy (PL) is performed to study the CdS QDs interactions with a standard solution of aflatoxins (B1, B2, G1, and G2 in a ratio of 5:1:5:1) in order to determine their effectiveness as aflatoxin detectors. A green emission peak is observed at 508 nm, with an intensity enhancement positively correlated with total aflatoxin concentration. The lower limit of detection for total aflatoxin concentration is found to be 0.05 ppb, well below international contamination allowances for food products. PL variations with aflatoxin concentration are best described by a Langmuir-type equation in the concentration range of this study (2.4–48 ppb).
Starting Page	1453
Ending Page	1462
Page Count	10
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	294
Issue Number	9
e-ISSN	14351536
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-06-21
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CdS QDs Aflatoxin Photoluminescence Cysteamine Determination Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry Food Science Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Thin polymer films with embedded CdS nanocrystals

Simple synthesis of high-quality CdTe QDs in spherical polyelectrolyte brushes with stable and reversible photoluminescence

Polymers in focus: fluorescence correlation spectroscopy

Polyethylene-based composites containing high concentration of quantum dots

Study on the structure of pitch-polymer compositions by fluorescence microscope

Conductometric and fluorescence probe investigations of molecular interactions between dodecyltrimethylammonium bromide and dipeptides

Optical and electrical properties of quantum composite of polyvinyl alcohol matrix with CdSe quantum dots

Transfer of the editorship

Book Review : Colloid and Polymer Science , Volume 276 , Issue 4

Determination of total aflatoxin using cysteamine-capped CdS quantum dots as a fluorescence probe

Similar Documents

Thin polymer films with embedded CdS nanocrystals

Simple synthesis of high-quality CdTe QDs in spherical polyelectrolyte brushes with stable and reversible photoluminescence

Polymers in focus: fluorescence correlation spectroscopy

Polyethylene-based composites containing high concentration of quantum dots

Study on the structure of pitch-polymer compositions by fluorescence microscope

Conductometric and fluorescence probe investigations of molecular interactions between dodecyltrimethylammonium bromide and dipeptides

Optical and electrical properties of quantum composite of polyvinyl alcohol matrix with CdSe quantum dots

Transfer of the editorship

Book Review : Colloid and Polymer Science , Volume 276 , Issue 4

Determination of total aflatoxin using cysteamine-capped CdS quantum dots as a fluorescence probe