A Novel Method for Rapid and High-Performance SERS Substrate Fabrication by Combination of Cold Plasma and Laser Treatment.

In this paper, we report a simple yet efficient method for rapid and high-performance SERS substrate fabrication by a combination of cold plasma and laser treatment. Our analysis reveals that cold plasma pre-treatment significantly reduced surface roughness, transforming 200 nm spikes into an almost perfectly uniform surface, while enhancing the substrate's surface energy by lowering the water contact angle from 59° to 0°, all achieved within just 30 s of 0.9-mW plasma treatment, while 15-min green-laser treatment facilitated more uniform deposition of AuNPs across the entire treated area, effectively creating the SERS substrates.

Double-shelling AgInSnanocrystals with GaS/ZnS to make them emit bright and stable excitonic luminescence.

This paper presents the successful synthesis of AgInSnanocrystals (NCs) double-shelled with GaSand ZnS for emitting bright and narrow excitonic luminescence from AgInScore NCs. Additionally, the AgInSGaS/ZnS NCs with a core/double-shell structure have demonstrated high chemical and photochemical stability. The AgInSGaS/ZnS NCs were prepared via three steps: (i) synthesis of AgInScore NCs by solvothermal method at 200 °C for 30 min, (ii) shelling GaSon AgInScore NCs at 280 °C for 60 min to produce the AgInS/GaScore/shell structure, and (iii) the outermost ZnS shelling at 140 °C for 10 min.

Systematic synthesis of different-sized AgInS/GaSnanocrystals for emitting the strong and narrow excitonic luminescence.

This paper presents for the first time the systematic synthesis of AgInS(AIS) nanocrystals (NCs) with different sizes of 2.6-6.8 nm just by controlling only the reaction temperature.