Flexible SERS active detection from novel Ag nano-necklaces as highly reproducible and ultrasensitive tips
Source abstract
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy has been considered as a promising way to realize real-time, in-situ and ultrasensitive analysis of chemoand biochemical molecules in different applications even in intracellular or aqueous environments. In this work, polymer-supported novel Ag nano-necklaces (AgNLs) as flexible SERS substrates were fabricated for ultrasensitive chemical and biological detection. With the stringing of dense “hot spot” in three-dimension, AgNLs located on polydimethylsiloxane (PDMS) work like the removable and reusable “tip” on the surface of analytes with different morphologies and conditions. The novel substrate shows ultra-high enhancement factor (as high as 109) with excellent reproducibility and long-term stability (7 months) in an aqueous environment. With further functionalizing with p-mercaptobenzoic acid, AgNLs/PDMS elastomer also reveals sensitive and consistent pH detection ability over the wide range of pH 4.0–9.0, indicating their wide applications in biological and environmental fields. This work provides a feasible strategy for designing ultrasensitive, reproducible and flexible SERS substrate for practical detection.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gold and Silver Nanoparticles Synthesis and Applications · Biosensors and Analytical Detection · Advanced Nanomaterials in Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
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