期刊
ACS NANO
卷 10, 期 1, 页码 1156-1162出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b06454
关键词
superamphiphobicity; cone-shaped silicon nanowire clusters; in-contact flow microsystem; gas-liquid binary process
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2008-0061983]
- National Research Foundation of Korea [2008-0061983] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Gas and liquid streams are invariably separated either by a solid wall or by a membrane for heat or mass transfer between the gas and liquid streams. Without the separating wall, the gas phase is present as bubbles in liquid or, in a microsystem, as gas plugs between slugs of liquid. Continuous and direct contact between the two moving streams of gas and liquid is quite an efficient way of achieving heat or mass transfer between the two phases. Here, we report a silicon nanowire built-in microsystem in which a liquid stream flows in contact with an underlying gas stream. The upper liquid stream does not penetrate into the lower gas stream due to the superamphiphobic nature of the silicon nanowires built into the bottom wall, thereby preserving the integrity of continuous gas and liquid streams, although they are flowing in contact. Due to the superamphiphobic nature of silicon nanowires, the microsystem provides the best possible interfacial mass transfer known to date between flowing gas and liquid phases, which can achieve excellent chemical performance in two-phase organic syntheses.
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