Optical and Physicochemical Characterizations of a Cellulosic/CdSe-QDs@S-DAB5 Film

Nanomaterials

Juana Benavente¹  Beatriz Alonso²  Carmen M. Casado²  Manuel Algarra³  Rocío Romero⁴  Ana L. Cuevas⁴  Ma Valle Martínez de Yuso⁵ 

[1] Departamento de Física Aplicada I, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain;Departamento de Química Inorgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain;INAMAT2-Institute for Advanced Materials and Mathematics, Departamento de Ciencias, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain;Unidad de Nanotecnología, Centro de Supercomputación y Bioinnovación, Servicios Centrales de Investigación, Universidad de Málaga, 29071 Málaga, Spain;X-ray Photoelectron Spectroscopy Lab., Central Service to Support Research Building (SCAI), Universidad de Málaga, 29071 Málaga, Spain;

关键词: CdSe quantum dots;    dendrimers;    regenerated cellulose modified film;    optical properties;   

DOI  :  10.3390/nano12030484

来源: DOAJ

【 摘 要 】

CdSe quantum dots nanoparticles were coated with the thiolated (DiAminoButane based dendrimer) DAB dendrimer of fifth generation (S-DAB₅) and embedded in a highly hydrophilic regenerated cellulose (RC) film by simple dip-coating method (immersion in QD-dendrimer aqueous solution) as a way to get a flexible nano-engineered film (RC-4/CdSe-QDs@S-DAB₅) with high transparency and photoluminescence properties for different applications. Optical changes in the RC film associated with QDs inclusion were determined by spectroscopic ellipsometry (SE) measurements, which provide information on changes caused in the refraction index and the extinction coefficients of the film, as well as by light transmittance/reflectance curves and photoluminescence (PL) spectra. Impedance spectroscopy (IS) and other typical physicochemical techniques for material characterization (TEM, SEM and XPS) have also been used in order to have more complete information on film characteristics. A comparison of RC-4/CdSe-QDs@S-DAB₅ film optical characteristics with those exhibited by other RC-modified films depending on the type of dendrimer was also carried out.

【 授权许可】

Unknown