From nanohole to ultralong straight nanochannel fabrication in graphene oxide with swift heavy ions

Abstract

Porous architectures based on graphene oxide with precisely tailored nm-sized pores are attractive for biofluidic applications such as molecular sieving, DNA sequencing, and recognition-based sensing. However, the existing pore fabrication methods are complex, suffer from insufficient control over the pore density and uniformity, or are not scalable to large areas. Notably, creating vertical pores in multilayer films appears to be particularly difficult. Here, we show that uniform 6–7 nm-sized holes and straight, vertical nanochannels can be formed by simply irradiating graphene oxide (GO) films with high-energy heavy ions. Long penetration depths of energetic ions in combination with localized energy deposition and effective self-etching processes enable the creation of through pores even in 10 µm-thick GO films. This fully scalable fabrication provides a promising possibility for obtaining innovative GO track membranes.

Tuning LSPR of Thermal Spike-Induced Shape-Engineered Au Nanoparticles Embedded in Si3N4 Thin-Film Matrix for SERS Applications

“…46 Moreover, these high energetic heavy ions cause significant changes in the surface morphology, which further increases the SERS signal by means of lightningrod effect 4 as these modified regions over the surfaces or interfaces serve as electromagnetic "hotspots". 47 Thus, the applications of high energetic SHI modified NCs as SERS reported in this study will open new possibilities for highly sensitive detection and characterization of molecules, paving the way for advancements 48 in fields such as biosensing, environmental monitoring, and materials science.…”

Schottky barrier reduction on optoelectronic responses in heavy ion irradiated WSe2 memtransistors

“…19 By employing 2D films with SHI irradiation-induced nanoscale holes as ion sieves, we can define the size, distribution and density of conductive channels. 20 Furthermore, narrowing the nanopores can restrict the ion species allowed to pass, which can mitigate the high operation current and stuck-ON issues. 7 Great sensitivity enhancement in graphene gas detectors was achieved using SHI irradiation technology.…”

Ion beam processing of DNA origami nanostructures

“…Hillock structures are usually formed upon such interaction with single-crystal materials [19], while craters and particle tracks form on polymeric thin films such as PMMA [20,21]. The dimensions of such features can be influenced by the interplay of various factors concerning material properties and the parameters of the impinging ion beam [22][23][24][25]. While crucial for modern nanotechnology, SHI cause severe damage to DNA [26][27][28].…”