Single molecule trapping and sensing using dual nanopores separated by a zeptoliter nanobridge
File(s)acs.nanolett.7b03196.pdf (4.79 MB)
Published version
Author(s)
Type
Journal Article
Abstract
There is a growing realization, especially within the diagnostic and therapeutic community, that the amount of information enclosed in a single molecule can not only enable a better understanding of biophysical pathways, but also offer exceptional value for early stage biomarker detection of disease onset. To this end, numerous single molecule strategies have been proposed, and in terms of label-free routes, nanopore sensing has emerged as one of the most promising methods. However, being able to finely control molecular transport in terms of transport rate, resolution, and signal-to-noise ratio (SNR) is essential to take full advantage of the technology benefits. Here we propose a novel solution to these challenges based on a method that allows biomolecules to be individually confined into a zeptoliter nanoscale droplet bridging two adjacent nanopores (nanobridge) with a 20 nm separation. Molecules that undergo confinement in the nanobridge are slowed down by up to 3 orders of magnitude compared to conventional nanopores. This leads to a dramatic improvement in the SNR, resolution, sensitivity, and limit of detection. The strategy implemented is universal and as highlighted in this manuscript can be used for the detection of dsDNA, RNA, ssDNA, and proteins.
Date Issued
2017-09-01
Date Acceptance
2017-09-01
Citation
Nano Letters, 2017, 17 (10), pp.6376-6384
ISSN
1530-6984
Publisher
American Chemical Society
Start Page
6376
End Page
6384
Journal / Book Title
Nano Letters
Volume
17
Issue
10
Copyright Statement
This is an open access article published under a Creative Commons Attribution (CC-BY)
License, which permits unrestricted use, distribution and reproduction in any medium,
provided the author and source are cited.
License, which permits unrestricted use, distribution and reproduction in any medium,
provided the author and source are cited.
Sponsor
Commission of the European Communities
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Commission of the European Communities
Biotechnology and Biological Sciences Research Council (BBSRC)
Imperial College London
Identifier
https://pubs.acs.org/doi/10.1021/acs.nanolett.7b03196
Grant Number
279818
677677
EP/P011985/1
724300
BB/M022080/1
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
Single molecule zeptoliter confinement
DNA recoiling dynamics
dual nanopore
nanoscale droplet
SNR enhancement
DNA profiling
SOLID-STATE NANOPORE
DNA TRANSLOCATION
TEMPORAL RESOLUTION
IDENTIFICATION
MICROSCOPY
TRANSPORT
GRAPHENE
SENSORS
TIME
DNA profiling
DNA recoiling dynamics
SNR enhancement
Single molecule zeptoliter confinement
dual nanopore
nanoscale droplet
Nanoscience & Nanotechnology
Publication Status
Published online
Date Publish Online
2017-09-08