High-yield synthesis of silver nanowires for transparent conducting PET films

Abstract

Silver nanowires (AgNWs) with ultrahigh purity and high yield were successfully synthesized by employing a modified facile polyol method using PVP as a capping and stabilizing agent. The reaction was carried out at a moderate temperature of 160 °C under mild stirring for about 3 h. The prepared AgNWs exhibited parallel alignment on a large scale and were characterized by UV–vis spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and PL spectroscopy. The luminescent AgNWs exhibited red emission, which was accredited to deep holes. The SEM results confirmed the formation of AgNWs of 3.3 to 4.7 µm in length with an average diameter of about 86 nm, that is, the aspect ratio values of the AgNWs exceeded 45. An ink consisting of hydroxyethyl cellulose (HEC) and AgNWs was transferred to polyethylene terephthalate (PET) films by simple mechanical pressing. The PET films retained transparency and flexibility after the ink coating. The maximum transmittance value of as-prepared PET films in the visible region was estimated to be about 92.5% with a sheet resistance value of ca. 20 Ω/sq. This makes the films a potential substitute to commonly used expensive indium tin oxide (ITO) in the field of flexible optoelectronics.

Polyol synthesis of Ag nanowires and biocidal activity of the obtained product

“…The synthesis of silver nanowires was carried out according to the modified procedure of Naz et al 18 Ethylene glycol, HOCH2CH2OH (Carlo Erba, rpe), was used as solvent and reductant. Silver nitrate, AgNO3 (Merck, pa), was used as the source of silver.…”

Effect of Morphological Changes due Conductivity Enhancing Post Treatment on the Absorption and Photoluminescence of AgNW Thin Films

“…The wavelength and the shape of plasmon resonances depend on the material, the size of the nanoparticle, its shape and the surrounding environment [44,45]. Spherical nanoparticles exhibit only a single surface plasmon resonance (SPR) which appears in case of silver at around 400 nm dependent on the size [46]. Whereas nanowires feature two SPRs below 400 nm whereby the length and diameter as well as the symmetry of the wire cross section are known to affect the frequency and spectral shape of the plasmon resonance [47,48].…”

Understanding the Nucleation and Growth Kinetics of the Microwave-Assisted Synthesis of Silver Nanowires

“…Metal nanowires (NWs) such as silver (Ag), copper (Cu), and gold (Au) NWs have unique dimension-dependent electrical, catalytic, optical, and antimicrobial properties that have potential benefits in applications such as transparent electronics, , flexible/stretchable conductors, photonics, solar cells, wearable devices, sensors, electrocatalysts, surface-enhanced Raman spectroscopy (SERS) technology, and lithium-ion batteries . Among all the metals, silver nanowires have huge commercial potential because they have low cost, high stability, high transparency, and high electrical and thermal conductivities.…”