Abstract
A novel method for synthesizing polyvinyl alcohol (PVA) embedded gold film is presented. Gold particles, in the size range of 20 to 180 nm, were first prepared by the conventional Turkevitch method by the reduction of gold, hydrogen tetrachloroaurate (HAuCl4) with sodium citrate in water. The resulting gold nanoparticles were characterized by ultra violet-visible (UV-Vis) absorption spectroscopy, dark-field microscopy, transmission electron microscopy (TEM) and field emission electron microscopy (FESEM). In the preparation of PVA embedded gold film, PVA was functionalized with (3-mercaptopropyl) trimethoxysilane (MPTMS) which produced a thiol functionality on the surface. Then, gold particles were embedded on the surface of partially dried functionalized PVA where the gold particles are chemisorbed onto the thiol groups. Their physical properties were studied using Fourier transform infra red spectroscopy (FTIR), FESEM, TEM and UV-Vis diffuse reflectance (UV-Vis DR). Considering that the gold nanoparticles in solution cannot possibly be recovered and reused, the PVA embedded gold film on the other hand, has potential to be reused multiple of times.
Highlights
Nanotechnology is an anticipated manufacturing technology that allows thorough, inexpensive control of the structure of matter by working with atoms
The formation-growth of gold clusters was monitored by ultra violet-visible (UV-Vis) spectroscopy, looking at the very intensive surface plasmon resonance (SPR) absorption in the visible region characterizing nano-sized gold
Gold nanoparticles embedded on the surface of polyvinyl alcohol (PVA) were successfully synthesized and characterized by Fourier transform infra red spectroscopy (FTIR), field emission electron microscopy (FESEM) and transmission electron microscopy (TEM)
Summary
Nanotechnology is an anticipated manufacturing technology that allows thorough, inexpensive control of the structure of matter by working with atoms. It allows many things to be manufactured at low cost and with no pollution. Nanotechnologies can extend the long-established trend toward smaller, faster, cheaper materials and devices. Sometimes called the building block of nanotechnology, nanoparticles (particles with diameter less than 100 nm) constitute a commercially important sector of the nanotechnology market. Recent intense interest in nanoparticles stems from the fact that, materials at the nanoscale exhibit unique optical, electronic and magnetic properties not seen in the bulk scale, which makes nanostructures attractive for a wide range of applications. Nanostructures made from the noble metals, such as gold, with their associated strong surface plasmon resonance (SPR) have attracted considerable attention
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