Fluidic and Electronic Transport in Silicon Nanotube Biosensors. Issue 56 (10th May 2016)

• Record Type: Journal Article
• Authors: Hibst, Nicolas; Steinbach, Annina M.; Strehle, Steffen
• Is Part Of: MRS advances. Volume 1:Issue 56(2016)
• Page Start: 3761
• Page End: 3766
• Publication Date: 2016-05-10
• Subjects: Si, -- nanoscale, -- fluidics; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/adv.2016.330
• Languages: English
• ISSNs: 2059-8521

Abstract

ABSTRACT: Silicon nanotubes (SiNTs) represent unique building blocks for future nanoscale biosensor devices merging electronic sensing and nanofluidics. Configured as ion-sensitive field effect transistors (ISFETs), SiNTs have great potential for charge sensing or label-free chemical detection in minute sample volumes flowing through their inner cavity. In the present study, doped SiNTs were synthesized from the gas phase in a bottom-up approach. To study their nanofluidic and electronic transport properties, single SiNTs were functionally integrated as ISFETs and coupled to a microfluidic system. The experimental results for ion diffusion through a SiNT are in full agreement with numerical calculations based on Fick's second law if a diffusion coefficient is assumed approximately one order of magnitude smaller than the bulk value.