Ag nanoparticles immobilized on C:H:N:O plasma polymer film by elevated temperature for LSPR sensing

Abstract

The dependence of nanoparticles' plasmonic properties on the medium's material surrounding them finds utilization in sensing applications. However, as the detection sensitivity exponentially decreases with distance from the nanoparticles, direct contact between the medium and the nanoparticles is required to obtain the highest signal. This study shows how to prepare such a localized surface plasmon resonance sensor composed of gas-phase synthesized Ag nanoparticles and magnetron sputtered C:H:N:O plasma polymer film. It is proved that excellent stability of Ag/C:H:N:O, enduring even ultrasound bath, may be reached by heating the C:H:N:O film during the deposition of Ag nanoparticles.Such a prepared sensor exhibits a sensitivity of 78 nm/ RIU and detects medium changes at distances over 32 nm from its surface.

Plasma‐deposited AgOx‐doped TiOx coatings enable rapid antibacterial activity based on ROS generation

“…Similar findings on restructuring processes upon storage in water or ambient air involving H 2 O have been observed for various plasma-deposited metastable coating systems. [60,[62][63][64] Upon reduction of AgOx, the TiOx support became highly oxidized with few Ti 3+ sites left after 1 year of storage in the dark (Figure 11b).…”

Unraveling Structural Carboxyl Defects in g‐C3N4 for Improved Photocatalytic H2 Evolution via Alternating Hydrogen‐Oxygen‐Plasma Treatment

“…The free radicals in plasma form a network cross‐linking structure with these bonds, which greatly activates the surface activity. [ 15–17 ] However, there is no reports on the rational preparation of defective g‐C 3 N 4 by designed two‐step plasma treatment to achieve the functions beyond conventional plasma. Here, a microwave surface‐wave plasma device with good ionization efficiency and ideal plasma purity was built to well support the two‐step plasma reaction.…”