Determination of nanoparticles using UV-Vis spectra

Nanoparticles (NPs) are increasingly being used in different branches of science and in industrial applications; however, their rapid detection and characterization at low concentration levels have remained a challenge; more specifically, there is no single technique that can characterize the physic...

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Bibliographic Details
Published in:Nanoscale 2015-03, Vol.7 (12), p.5134-5139
Main Authors: Behzadi, Shahed, Ghasemi, Forough, Ghalkhani, Masoumeh, Ashkarran, Ali Akbar, Akbari, Seyed Mostafa, Pakpour, Sepideh, Hormozi-Nezhad, Mohammad Reza, Jamshidi, Zahra, Mirsadeghi, Somayyeh, Dinarvand, Rassoul, Atyabi, Fatemeh, Mahmoudi, Morteza
Format: Article
Language:English
Subjects:
Aqueous solutions
Chemometrics
Colorimetry
Gold
Nanoparticles
Nanostructure
Sensor arrays
Spectra
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Summary:Nanoparticles (NPs) are increasingly being used in different branches of science and in industrial applications; however, their rapid detection and characterization at low concentration levels have remained a challenge; more specifically, there is no single technique that can characterize the physicochemical properties of NPs (e.g. composition and size). In this work we have developed a colorimetric sensor array for defining the physicochemical properties of NPs in aqueous solution with ultra-low concentrations (e.g. 10(-7) g ml(-1) for gold NPs). Various NPs were readily identified using a standard chemometric approach (i.e. hierarchical clustering analysis), with no misclassifications over 400 trials.
ISSN:2040-3364
2040-3372
DOI:10.1039/c4nr00580e