Brookhaven’s BI-200SM Used in Synthesizing Gold Nanoparticles

Nov 7, 2019
Applications: NanoParticles
Instruments: BI-200SM
image of gold particles

“Synthesis of Gold Nanoparticles Grafted with a Thermoresponsive Polymer by Surface-Induced Reversible-Addition-Fragmentation Chain-Transfer Polymerization” is a research study conducted by Janne Raula. It’s aim was to explore and demonstrate the synthesis of well-defined gold nanoclusters with a polymeric-coating. Additionally, it’s goal was to obtain a water-soluble MPC nanoparticle with an environmentally sensitive polymer layer that allowed the particle solubility to be altered.

Brookhaven’s BI-200SM Goniometer was used to perform a dynamic light scattering (DLS) analysis on the nanomaterials used in this study to ensure accurate and consistent data. Nanosized, spherical, gold clusters coated with poly (N-isopropylacrylamide) (PNIPA) grafts were prepared by controlled radical polymerization. The polymerization of N-isopropylacrylamide was initiated from the surface of a gold nanoparticle modified with 4-cyanopentanoic acid dithiobenzoate for a reversible-addition-fragmentation chain-transfer polymerization. It was observed that during the collapse of PNPIPA ligands, the surroundings of the gold surface changed from hydrophilic to hydrophobic. Through this study, it was shown that the optical properties of gold could be varied by a thermally responsive polymer monolayer. In addition, knowing that PNIPA was also very sensitive to different salts, it could be imagined that such gold nanoclusters could be utilized in certain electrical and optical applications.

Metal nanoparticles, especially gold nanoparticles, have attracted much attention because of their electrical and optical properties. To better understand the properties and other factors that affect metal nanoparticles, experts only use capable and precise instruments. Brookhaven Instruments offers a wide array of high quality and easy to use equipment, including BI-200SM. The BI-200SM Goniometer allows for both Static Light Scattering and Dynamic Light Scattering techniques.