An advanced plasmonic bimetallic nanostar composite for ultra-sensitive SERS detection of crystal violet.

The controlled synthesis of Ag/Au nanocomposite particles has remained a significant challenge in nanomaterial research. This study presents the synthesis, characterization, and surface-enhanced Raman scattering (SERS) performance of silver (Ag) and gold (Au) nanostar composites. The structural and plasmonic properties of these nanocomposites were optimized by varying the molar ratios of silver nanostars (AgNSs) and gold nanostars (AuNSs).

Glutathione and cystamine functionalized MoScore-shell nanoparticles for enhanced electrochemical detection of doxorubicin.

Two-dimensional (2D) MoScore-shell nanoparticles were synthesized using an eco-friendly surface functionalization-agent with L-glutathione and cystamine (L-GSH-MoS-CYS) using ultrasonic frequency of 20-25 kHz. The novel modified electrode was evaluated for the electrochemical detection of doxorubicin (DOX), through cyclic and differential pulse voltammetric techniques. The electro-catalytic oxidation currents of DOX exhibited a linear relationship in the concentration ranges 0.

Thermosensitive double network of zwitterionic polymers for controlled mechanical strength of hydrogels.

Zwitterionic hydrogels have promising potential as a result of their anti-fouling and biocompatible properties, but they have recently also gained further attention due to their controllable stimuli responses. We successfully synthesized two zwitterionic polymers, poly(2-methacryloyloxyethyl phosphorylcholine) (poly-MPC) and poly(2-(methacryloyloxy)ethyl dimethyl-(3-sulfopropyl)ammonium hydroxide) (poly-DMAPS), which have complementary ionic sequences in their respective zwitterionic side groups and likely form an interpenetrating double network to improve their mechanical strength. The synthesized poly-MPC was blended in a poly-DMAPS matrix (MD gel) and showed high viscosity, while poly-DMAPS was blended in a poly-MPC hydrogel (DM gel) and revealed UCST behavior as the temperature increased.

Two-photon confocal imaging study: cell uptake of two photon dyes-labeled PAMAM dendrons in HeLa cells.

A two-photon excitation difluoroboron dye activated in the near infrared region for biological image analysis was synthesized in this study. Cell affinity, membrane interaction, and the endocytosis pathway of PAMAM dendrons were investigated using only covalent two-photon dyes (TPD) at the periphery of the PAMAM dendrons. Generation 3 TPD-labeled PAMAM dendrons (BG3) exhibited multivalency binding on the HeLa cell membranes from the cell affinity study in the fixation of HeLa cells.