Copper‐Nanocluster‐Based Transparent Ultraviolet‐Shielding Polymer Films

Abstract

Transparent, utraviolet (UV) shielding composite materials, which combine the polymer matrix and organic or inorganic UV absorbers, are attractive for packaging industry. Many of these composite films are still suffering from several issues, such as low stability, toxicity of the UV absorbers, and light scattering caused by aggregation. We introduce UV shielding films fabricated by using copper nanoclusters embedded in the polymer framework of the cross-linked polyvinyl alcohol and polyvinylpyrrolidone. Such composite films show a high UV shielding ability, and allow for transmittance of light in the visible range; they possess favourable mechanical properties (flexibility), thermal stability, and stability against UV light exposure. Potential applicability of the films is demonstrated through protection of Rhodamine B dye from photodegradation.[a] Dr.

A coumarin-containing Schiff base fluorescent probe with AIE effect for the copper(ii) ion

“…17 As a result, various types of uorescent probes such as organic dyes, magnetic nanoparticles (MNPs), semiconductor quantum dots (QDs), carbon dots (CDs), uorescent metal nanoclusters (NCs), and uorescent metal organic frameworks (MOFs) have been designed and prepared to determine Cu 2+ ion. [18][19][20][21][22][23][24][25][26][27] Since rst reported in 2000, MNPs are extensively used in the eld of nanotechnology for its nonhazardous feature, strong magnetization values, superparamagnetic property, active surface that can easily assembled of biological soluble structure and targeting, imaging, and therapeutic molecules. 22 Unlike organic uorescent dyes, QDs are semiconductor particles which exhibit high photochemical stability, excellent resistance to chemical degradation, outstanding photodegradation and extremely large Stokes shi.…”

Structural, Mechanical and Electrical Properties of Sputter Coated Copper Thin Films on Poly Ethylene Terephthalate 

“…The CuNPs exhibited transmittance band around 580 nm, related to conduction electrons excitation of the Cu metal NPs after their unique interaction with the electromagnetic light eld. The recorded UV/Vis transmission results indicate that Cu/PET composite lms offer good performance in terms of UV light shielding combined with reasonable transparency in the visible region, as well as exibility of the lms [34].…”

Metal Nanoclusters/Polyvinyl Alcohol Composite Films as the Alternatives for Fabricating Remote-Type White Light-Emitting Diodes

“…The IR spectra of the MNCs/PVA composite films ma the fundamental vibrational bands of PVA without the appearance of any additiona (Figure S6). Comparatively, the characteristic stretching vibration peak of the hyd group in PVA at 2947 cm −1 shifts to 2942 in Cu-MMI NCs/PVA, 2942 cm −1 in Au NCs/PVA and 2938 cm −1 in Au-BSA NCs/PVA, respectively [45]. These results in To explore the interaction between MNCs and PVA in the composite films, X-ray radiation diffraction (XRD) is performed.…”