Ion and Hydrodynamic Translucency in 1D van der Waals Heterostructured Boron-Nitride Single-Walled Carbon Nanotubes
[2];
[3];
[3];
[4];
[3];
[2];
[5]
- Rutgers Univ., Piscataway, NJ (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Univ. of Tokyo (Japan)
- Univ. of Tokyo (Japan); Zhejiang Univ., Hangzhou (China)
- Rutgers Univ., Piscataway, NJ (United States)
An unresolved challenge in nanofluidics is tuning ion selectivity and hydrodynamic transport in pores, particularly for those with diameters larger than a nanometer. In contrast to conventional strategies that focus on changing surface functionalization or confinement degree by varying the radial dimension of the pores, we explore a unique approach for manipulating ion selectivity and hydrodynamic flow enhancement by externally coating single-walled carbon nanotubes (SWCNTs) with a few layers of hexagonal boron nitride (h-BN). Here, for van der Waals heterostructured BN-SWCNTs, we observed a 9-fold increase in cation selectivity for K+ versus Cl– compared to pristine SWCNTs of the same 2.2 nm diameter, while hydrodynamic slip lengths decreased by more than an order of magnitude. These results suggest that the single-layer graphene inner surface may be translucent to charge-regulation and hydrodynamic-slip effects arising from h-BN on the outside of the SWCNT. Such 1D heterostructures could serve as synthetic platforms with tunable properties for exploring distinct nanofluidic phenomena and their potential applications.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); Defense Threat Reduction Agency (DTRA); National Science Foundation (NSF)
- Grant/Contract Number:
- AC52-07NA27344; AC02-05CH11231; BA12PHM123; 1762913
- OSTI ID:
- 2325216
- Report Number(s):
- LLNL-JRNL-861512; 1092628
- Journal Information:
- ACS Nano, Vol. 18, Issue 1; ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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