Advancement of Next‐Generation DNA Sequencing through Ionic Blockade and Transverse Tunneling Current Methods

Abstract

DNA sequencing is transforming the field of medical diagnostics and personalized medicine development by providing a pool of genetic information. Recent advancements have propelled solid‐state material‐based sequencing into the forefront as a promising next‐generation sequencing (NGS) technology, offering amplification‐free, cost‐effective, and high‐throughput DNA analysis. Consequently, a comprehensive framework for diverse sequencing methodologies and a cross‐sectional understanding with meticulous documentation of the latest advancements is of timely need. This review explores a broad spectrum of progress and accomplishments in the field of DNA sequencing, focusing mainly on electrical detection methods. The review delves deep into both the theoretical and experimental demonstrations of the ionic blockade and transverse tunneling current methods across a broad range of device architectures, nanopore, nanogap, nanochannel, and hybrid/heterostructures. Additionally, various aspects of each architecture are explored along with their strengths and weaknesses, scrutinizing their potential applications for ultrafast DNA sequencing. Finally, an overview of existing challenges and future directions is provided to expedite the emergence of high‐precision and ultrafast DNA sequencing with ionic and transverse current approaches.

The Merits of a Folded Graphene Nanodevice for Reliable DNA Sequencing

“…However, the surface properties of such graphene-based nanopores/nanogaps are susceptible to the target DNA nucleotides. Moreover, such a nanodevice generates high noise ratio and geometry deformation after the insertion of a DNA molecule into the nanopore/nanogap. ,, This has further encouraged the investigation of other low-dimensional (2D) potential materials, such as molybdenum disulfide (MoS 2 ), silicene (Si), boron nitride (BN), graphene-hBN, black phosphorene, and boron carbide (BC 3 ), to name a few …”