The interactions between functionalized noble-metal particles in an aqueous solution are central to applications relying on controlled equilibrium association. Herein, we obtain the potentials of mean force (PMF) for pair-interactions between functionalized gold nanoparticles (AuNPs) in physiological saline. These results are based upon >1000 ns experiments in silico of all-atom model systems u...

Parametric optimization of the laser-assisted photocatalytic growth Ag and Au nanoparticles for high SERS enhancement factor performance informed by design experiment is demonstrated. The photodeposition process was divided into two phases –seeding growth– in order to achieve highest possible nanoparticle surface coverage size range from 10 100 nm. A substantial difference parameter effects bet...

Conventional photoredox catalytic additions of alcohols to olefins require additives, like thiophenol, promote back electron transfer. The concept “photozymes” assumes that forward and backward transfer steps in a cycle are controllable by substrate binding photocatalytically active peptides. Accordingly, we synthesized short tripeptide modified with 1,7-dicyano-perylene-3,4 : 9,10-tetracarboxy...

Layers of thiophenol functionalized spherical gold nanoparticles grafted on Si(100) are probed by linear UV-vis, Fourier transform infrared and nonlinear infrared-visible vibrational sum/difference–frequency generation spectroscopies as a function of the nanoparticles surface coverage. Depending on the dipping time (5 min, 20 min, 1 h, and 24 h) in the colloidal solution, AFM imaging corroborat...

Nanocrescent-like structures have become important surface enhanced Raman scattering structures because instead of relying on a few nanometer gap inter-particle plasmonic coupling to achieve local field enhancement, intra-particle plasmonic coupling between the cavity modes and the tip edges are utilized to achieve high local field enhancement at the tips. Our fabrication approach creates ‘nano...

Removal of As from petroleum feedstocks is an important process which can be realized using trapping mass containing supported nickel sulfide. In order to understand the mechanism we studied reaction AsPh3 with NiS/?-Al2O3 in presence H2 a batch reactor toluene solution at 230 °C. This results formation NiAs, benzene and H2S. Also, intermediate species, thiophenol diphenylsulfide, were observed...