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Issue 2, 2019
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Surface-enhanced Raman scattering on a silver-coated TiO2 nanopore core needle biopsy for three dimensional chemical profiling

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Abstract

In vivo analyzing chemical significance under human skin has impinged a formidable challenge upon regular optical methods due to its intrinsic opaque property. With analogy to a needle biopsy, conceptually and practically, here, we fabricated a “needle-like” nanopore-embellished TiO2 column through electrochemistry directed etching, intriguingly serving as hundreds of thousands of liquid containers, perpendicular to the needle axle. A silver nanostructure synthesized in situ within the nanotube array gives rise to an opportunity for enhanced Raman detection to profile the extracts with excellent sensitivity and considerable spatial resolution, delineating the molecular information in depth. This SERS-active needle, which combined the functions of liquid biopsy and optical detection can penetrate the upper skin layer with minimal invasion and obviation of the extra step for the mass-limited sample transferring, unraveling the chemical insights underneath the opaque materials.

Graphical abstract: Surface-enhanced Raman scattering on a silver-coated TiO2 nanopore core needle biopsy for three dimensional chemical profiling

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Publication details

The article was received on 19 Sep 2018, accepted on 09 Nov 2018 and first published on 12 Nov 2018


Article type: Paper
DOI: 10.1039/C8AY02057D
Citation: Anal. Methods, 2019,11, 171-178

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    Surface-enhanced Raman scattering on a silver-coated TiO2 nanopore core needle biopsy for three dimensional chemical profiling

    R. Liu, T. Sha and B. Nie, Anal. Methods, 2019, 11, 171
    DOI: 10.1039/C8AY02057D

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