Unexpected behaviors in molecular transport through size-controlled nanochannels down to the ultra-nanoscale.
Unexpected behaviors in molecular transport through size-controlled nanochannels down to the ultra-nanoscale.
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DOI：
10.1038/s41467-018-04133-8
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发表时间：
2018-04-27
影响因子：
16.6
通讯作者：
Grattoni A
中科院分区：
文献类型：
--
作者：
Bruno G;Di Trani N;Hood RL;Zabre E;Filgueira CS;Canavese G;Jain P;Smith Z;Demarchi D;Hosali S;Pimpinelli A;Ferrari M;Grattoni A
Ionic transport through nanofluidic systems is a problem of fundamental interest in transport physics and has broad relevance in desalination, fuel cells, batteries, filtration, and drug delivery. When the dimension of the fluidic system approaches the size of molecules in solution, fluid properties are not homogeneous and a departure in behavior is observed with respect to continuum-based theories. Here we present a systematic study of the transport of charged and neutral small molecules in an ideal nanofluidic platform with precise channels from the sub-microscale to the ultra-nanoscale (<5 nm). Surprisingly, we find that diffusive transport of nano-confined neutral molecules matches that of charged molecules, as though the former carry an effective charge. Further, approaching the ultra-nanoscale molecular diffusivities suddenly drop by up to an order of magnitude for all molecules, irrespective of their electric charge. New theoretical investigations will be required to shed light onto these intriguing results. Transport through nanochannels is usually dominated by electrostatic interactions and depends on the charge of diffusing molecules. Here the authors show that for channel heights between 2 and 4 nanometers, transport is insensitive to molecule charge.
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影响因子：
16.6
作者：
Akbari A;Sheath P;Martin ST;Shinde DB;Shaibani M;Banerjee PC;Tkacz R;Bhattacharyya D;Majumder M
通讯作者：
Majumder M
影响因子：
6.1
作者：
Fine, Daniel;Grattoni, Alessandro;Liu, Xuewu
通讯作者：
Liu, Xuewu
影响因子：
17.1
作者：
Gaborski TR;Snyder JL;Striemer CC;Fang DZ;Hoffman M;Fauchet PM;McGrath JL
通讯作者：
McGrath JL
影响因子：
7.4
作者：
Grattoni, Alessandro;Gill, Jaskaran;Ferrari, Mauro
通讯作者：
Ferrari, Mauro
影响因子：
10.8
作者：
Jeon, Gumhye;Yang, Seung Yun;Kim, Jin Kon
通讯作者：
Kim, Jin Kon