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Chitosan/P3HT biohybrid films as polymer matrices for the in‐situ synthesis of CdSe quantum dots. Experimental and theoretical studies
Author(s) -
MorenoSerna Viviana,
MéndezLópez Maximiliano,
VásquezEspinal Alejandro,
Saldías Cesar,
Leiva Ángel
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49075
Subject(s) - materials science , high resolution transmission electron microscopy , photoluminescence , thermogravimetric analysis , fourier transform infrared spectroscopy , quantum dot , chitosan , nanocomposite , spectroscopy , transmission electron microscopy , raman spectroscopy , polymer , chemical engineering , nanoparticle , attenuated total reflection , scanning electron microscope , nanotechnology , analytical chemistry (journal) , organic chemistry , chemistry , composite material , optics , optoelectronics , physics , engineering , quantum mechanics
Biohybrid nanocomposite films were obtained through a simple two‐step methodology. Films of chitosan/poly(3‐hexylthiophene) (CS/P3HT) were used as polymer matrices for the in‐situ synthesis and stabilization of CdSe quantum dots. The biohybrid materials were characterized by attenuated total reflectance Fourier transform infrared spectroscopy (ATR‐FTIR), Raman spectroscopy, UV–visible spectroscopy, thermogravimetric analysis (TGA), field emission scanning electron microscope (FESEM), high‐resolution transmission electron microscopy (HRTEM), and photoluminescence spectroscopy (PL). The effects of the P3HT composition on the properties of the QDs in the films were analyzed. The results confirmed that CS/P3HT films provided an adequately confining matrix for the growth of CdSe QDs with a fairly uniform size and revealed that the interactions between the CdSe nanoparticles and the CS/P3HT matrix mainly involved the OH and NH 2 groups. The optical band gaps of the biohybrid nanocomposite films were estimated. The results of photoluminescence revealed that a charge transfer phenomenon occurred in the polymer system. Finally, theoretical analyses suggest that the CdSe QDs would be preferentially located onto the chitosan domains.