4.7 Review

Fluorescent Biosensors Based on Silicon Nanowires

Journal

NANOMATERIALS
Volume 11, Issue 11, Pages -

Publisher

MDPI
DOI: 10.3390/nano11112970

Keywords

silicon nanowires; fluorescent sensors; biosensors; light-emission

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Nanostructures, especially silicon nanowires, are emerging as novel biosensing platforms promising to surpass current performance. Fluorescent sensors based on silicon nanowires offer easy data interpretation, measure affordability, and real-time in situ analysis, providing advantages and drawbacks for each strategy highlighted in the field literature review.
Nanostructures are arising as novel biosensing platforms promising to surpass current performance in terms of sensitivity, selectivity, and affordability of standard approaches. However, for several nanosensors, the material and synthesis used make the industrial transfer of such technologies complex. Silicon nanowires (NWs) are compatible with Si-based flat architecture fabrication and arise as a hopeful solution to couple their interesting physical properties and surface-to-volume ratio to an easy commercial transfer. Among all the transduction methods, fluorescent probes and sensors emerge as some of the most used approaches thanks to their easy data interpretation, measure affordability, and real-time in situ analysis. In fluorescent sensors, Si NWs are employed as substrate and coupled with several fluorophores, NWs can be used as quenchers in stem-loop configuration, and have recently been used for direct fluorescent sensing. In this review, an overview on fluorescent sensors based on Si NWs is presented, analyzing the literature of the field and highlighting the advantages and drawbacks for each strategy.

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