期刊
SCIENCE ADVANCES
卷 8, 期 6, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abl7002
关键词
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资金
- Japan Society for the Promotion of Science (JSPS) KAKENHI [18H01846, 17H06354]
- Grants-in-Aid for Scientific Research [18H01846, 17H06354] Funding Source: KAKEN
This study evaluates the heating phenomenon caused by diffusive ion transport in nanoscale conduits using thermocouple-embedded SiNx pores. The research found steady-state ionic heat dissipation in confined nanospace. Additionally, smaller pores exhibited higher heating efficiency due to a decrease in through-water thermal conduction.
Energy dissipation in solid-state nanopores is an important issue for their use as a sensor for detecting and analyzing individual objects in electrolyte solution by ionic current measurements. Here, we report on evaluations of heating via diffusive ion transport in the nanoscale conduits using thermocouple-embedded SiNx pores. We found a linear rise in the nanopore temperature with the input electrical power suggestive of steady-state ionic heat dissipation in the confined nanospace. Meanwhile, the heating efficiency was elucidated to become higher in a smaller pore due to a rapid decrease in the through-water thermal conduction for cooling the fluidic channel. The scaling law suggested nonnegligible influence of the heating to raise the temperature of single-nanometer two-dimensional nanopores by a few kelvins under the standard cross-membrane voltage and ionic strength conditions. The present findings may be useful in advancing our understanding of ion and mass transport phenomena in nanopores.
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