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Title: Fabrication of Subnanometer-Precision Nanopores in Hexagonal Boron Nitride

Journal Article · · Scientific Reports
 [1];  [1];  [2];  [1];  [3];  [2];  [2];  [4];  [5]
  1. Univ. of Calirnia, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of Calirnia, Berkeley, CA (United States). Kavli Energy NanoScience Inst.
  2. Univ. of Calirnia, Berkeley, CA (United States). Dept. of Physics; Univ. of Calirnia, Berkeley, CA (United States). Kavli Energy NanoScience Inst.
  3. Univ. of Calirnia, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of Calirnia, Berkeley, CA (United States). Kavli Energy NanoScience Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  5. Univ. of Calirnia, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of Calirnia, Berkeley, CA (United States). Kavli Energy NanoScience Inst.

Here, we demonstrate the fabrication of individual nanopores in hexagonal boron nitride (h-BN) with atomically precise control of the pore shape and size. Previous methods of pore production in other 2D materials typically create pores with irregular geometry and imprecise diameters. In contrast, other studies have shown that with careful control of electron irradiation, defects in h-BN grow with pristine zig-zag edges at quantized triangular sizes, but they have failed to demonstrate production and control of isolated defects. In this work, we combine these techniques to yield a method in which we can create individual size-quantized triangular nanopores through an h-BN sheet. The pores are created using the electron beam of a conventional transmission electron microscope; which can strip away multiple layers of h-BN exposing single-layer regions, introduce single vacancies, and preferentially grow vacancies only in the single-layer region. We further demonstrate how the geometry of these pores can be altered beyond triangular by changing beam conditions. Precisely size- and geometry-tuned nanopores could find application in molecular sensing, DNA sequencing, water desalination, and molecular separation.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOD
Grant/Contract Number:
AC02-05CH11231; HDTRA1-15-1-0036; DMR-1206512
OSTI ID:
1419454
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

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Cited By (13)

Novel Porous Boron Nitride Nanosheet with Carbon Doping: Potential Metal‐Free Photocatalyst for Visible‐Light‐Driven Overall Water Splitting journal January 2019
Comparing Current Noise in Biological and Solid-State Nanopores journal February 2020
Exploring the pore charge dependence of K + and Cl permeation across a graphene monolayer: a molecular dynamics study journal January 2019
Blue-Light-Emitting Color Centers in High-Quality Hexagonal Boron Nitride text January 2019
Strain-controlled Graphene-Polymer Angular Actuator journal January 2019
Fast water desalination by carbon-doped boron nitride monolayer: transport assisted by water clustering at pores journal December 2018
Recent advances in 2D nanopores for desalination journal May 2018
Quantitative insights into the growth mechanisms of nanopores in hexagonal boron nitride journal January 2020
Blue-light-emitting color centers in high-quality hexagonal boron nitride journal October 2019
Graphene/hexagonal boron nitride heterostructures: Mechanical properties and fracture behavior from nanoindentation simulations journal September 2018
Alternative stacking sequences in hexagonal boron nitride journal March 2019
High-harmonic generation from spin-polarised defects in solids journal January 2020
Addressing the isomer cataloguing problem for nanopores in two-dimensional materials journal January 2019

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