Enhanced wetting properties of silicon mesh microchannels coated with SiO2/SnO2 nanoparticles through layer-by-layer self assembly

Tao Zhang; Tianhong Cui

doi:10.1016/j.snb.2011.04.081

Enhanced wetting properties of silicon mesh microchannels coated with SiO₂/SnO₂ nanoparticles through layer-by-layer self assembly

Tao Zhang, Tianhong Cui

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The enhanced wetting property of silicon mesh microchannels coated with SiO₂/SnO₂ nanoparticles is presented in this paper. The SiO₂/SnO₂ bi-layers are prepared using layer-by-layer nano self assembly. It is found that the silicon mesh microchannels are super hydrophilic and demonstrated powerful capillary. The capillary rise rate is characterized by measuring the front location of liquid on the silicon mesh surface, laid on a 45° inclined platform. For a silicon mesh sample with an overall dimension of 25 mm × 25 mm, when the microchannel width is 0.5 mm, the liquid front can reach the top edge of the sample in approximately 30 s. The mesh silicon surface with a SiO₂/SnO₂ multilayer film presented in this paper has better wettability and higher capillary pressure than other hydrophilic surfaces reported. The results provide a new way to improve the capillary in microchannels with enhanced super hydrophilic surfaces in microchannels for variety of micro/nanofluidic applications.

Original language	English (US)
Pages (from-to)	697-702
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	157
Issue number	2
DOIs	https://doi.org/10.1016/j.snb.2011.04.081
State	Published - Oct 20 2011

Bibliographical note

Funding Information:
We are grateful to the Nanofabrication Center and Characterization Facility at the University of Minnesota for their help with fabrication and characterization. Tao Zhang He received his Ph.D. degree in mechanical engineering from Chinese Academy of Sciences, China, in 2007. He joined Prof. Tianhong Cui's group at the University of Minnesota in 2008. Currently, he works as a post-doctoral associate in the Department of Mechanical Engineering at the University of Minnesota. His research interest includes micro/nanofabrication, microfluidics, and surface modification. Tianhong Cui received his B.S. degree from Nanjing University of Aeronautics and Astronautics in 1991, and Ph.D. degree from the Chinese Academy of Sciences in 1995. He is currently a Professor of Mechanical Engineering at the University of Minnesota. From 1999 to 2003, he was an assistant professor of electrical engineering at Louisiana Technical University. Prior to that, he was a STA fellow at the National Laboratory of Metrology, and served as a postdoctoral research associate at the University of Minnesota and Tsinghua University. He received research awards including the Nelson Endowed Chair Professorship from the University of Minnesota, the Research Foundation Award from Louisiana Tech University, the Alexander von Humboldt Award in Germany, and the STA & NEDO fellowships in Japan. His current research interests include MEMS/NEMS, nanotechnology, and polymer electronics.

Keywords

Capillary
Layer-by-layer nano self assembly
Nanoparticle
Wetting property

Access

10.1016/j.snb.2011.04.081

OpenUrl availability

Full text

Cite this

@article{a3c234fea88c4a60b676a09ecda83802,

title = "Enhanced wetting properties of silicon mesh microchannels coated with SiO2/SnO2 nanoparticles through layer-by-layer self assembly",

abstract = "The enhanced wetting property of silicon mesh microchannels coated with SiO2/SnO2 nanoparticles is presented in this paper. The SiO2/SnO2 bi-layers are prepared using layer-by-layer nano self assembly. It is found that the silicon mesh microchannels are super hydrophilic and demonstrated powerful capillary. The capillary rise rate is characterized by measuring the front location of liquid on the silicon mesh surface, laid on a 45° inclined platform. For a silicon mesh sample with an overall dimension of 25 mm × 25 mm, when the microchannel width is 0.5 mm, the liquid front can reach the top edge of the sample in approximately 30 s. The mesh silicon surface with a SiO2/SnO2 multilayer film presented in this paper has better wettability and higher capillary pressure than other hydrophilic surfaces reported. The results provide a new way to improve the capillary in microchannels with enhanced super hydrophilic surfaces in microchannels for variety of micro/nanofluidic applications.",

keywords = "Capillary, Layer-by-layer nano self assembly, Nanoparticle, Wetting property",

author = "Tao Zhang and Tianhong Cui",

note = "Funding Information: We are grateful to the Nanofabrication Center and Characterization Facility at the University of Minnesota for their help with fabrication and characterization. Tao Zhang He received his Ph.D. degree in mechanical engineering from Chinese Academy of Sciences, China, in 2007. He joined Prof. Tianhong Cui's group at the University of Minnesota in 2008. Currently, he works as a post-doctoral associate in the Department of Mechanical Engineering at the University of Minnesota. His research interest includes micro/nanofabrication, microfluidics, and surface modification. Tianhong Cui received his B.S. degree from Nanjing University of Aeronautics and Astronautics in 1991, and Ph.D. degree from the Chinese Academy of Sciences in 1995. He is currently a Professor of Mechanical Engineering at the University of Minnesota. From 1999 to 2003, he was an assistant professor of electrical engineering at Louisiana Technical University. Prior to that, he was a STA fellow at the National Laboratory of Metrology, and served as a postdoctoral research associate at the University of Minnesota and Tsinghua University. He received research awards including the Nelson Endowed Chair Professorship from the University of Minnesota, the Research Foundation Award from Louisiana Tech University, the Alexander von Humboldt Award in Germany, and the STA & NEDO fellowships in Japan. His current research interests include MEMS/NEMS, nanotechnology, and polymer electronics. ",

year = "2011",

month = oct,

day = "20",

doi = "10.1016/j.snb.2011.04.081",

language = "English (US)",

volume = "157",

pages = "697--702",

journal = "Sensors and Actuators, B: Chemical",

issn = "0925-4005",

publisher = "Elsevier",

number = "2",

}

TY - JOUR

T1 - Enhanced wetting properties of silicon mesh microchannels coated with SiO2/SnO2 nanoparticles through layer-by-layer self assembly

AU - Zhang, Tao

AU - Cui, Tianhong

N1 - Funding Information: We are grateful to the Nanofabrication Center and Characterization Facility at the University of Minnesota for their help with fabrication and characterization. Tao Zhang He received his Ph.D. degree in mechanical engineering from Chinese Academy of Sciences, China, in 2007. He joined Prof. Tianhong Cui's group at the University of Minnesota in 2008. Currently, he works as a post-doctoral associate in the Department of Mechanical Engineering at the University of Minnesota. His research interest includes micro/nanofabrication, microfluidics, and surface modification. Tianhong Cui received his B.S. degree from Nanjing University of Aeronautics and Astronautics in 1991, and Ph.D. degree from the Chinese Academy of Sciences in 1995. He is currently a Professor of Mechanical Engineering at the University of Minnesota. From 1999 to 2003, he was an assistant professor of electrical engineering at Louisiana Technical University. Prior to that, he was a STA fellow at the National Laboratory of Metrology, and served as a postdoctoral research associate at the University of Minnesota and Tsinghua University. He received research awards including the Nelson Endowed Chair Professorship from the University of Minnesota, the Research Foundation Award from Louisiana Tech University, the Alexander von Humboldt Award in Germany, and the STA & NEDO fellowships in Japan. His current research interests include MEMS/NEMS, nanotechnology, and polymer electronics.

PY - 2011/10/20

Y1 - 2011/10/20

N2 - The enhanced wetting property of silicon mesh microchannels coated with SiO2/SnO2 nanoparticles is presented in this paper. The SiO2/SnO2 bi-layers are prepared using layer-by-layer nano self assembly. It is found that the silicon mesh microchannels are super hydrophilic and demonstrated powerful capillary. The capillary rise rate is characterized by measuring the front location of liquid on the silicon mesh surface, laid on a 45° inclined platform. For a silicon mesh sample with an overall dimension of 25 mm × 25 mm, when the microchannel width is 0.5 mm, the liquid front can reach the top edge of the sample in approximately 30 s. The mesh silicon surface with a SiO2/SnO2 multilayer film presented in this paper has better wettability and higher capillary pressure than other hydrophilic surfaces reported. The results provide a new way to improve the capillary in microchannels with enhanced super hydrophilic surfaces in microchannels for variety of micro/nanofluidic applications.

AB - The enhanced wetting property of silicon mesh microchannels coated with SiO2/SnO2 nanoparticles is presented in this paper. The SiO2/SnO2 bi-layers are prepared using layer-by-layer nano self assembly. It is found that the silicon mesh microchannels are super hydrophilic and demonstrated powerful capillary. The capillary rise rate is characterized by measuring the front location of liquid on the silicon mesh surface, laid on a 45° inclined platform. For a silicon mesh sample with an overall dimension of 25 mm × 25 mm, when the microchannel width is 0.5 mm, the liquid front can reach the top edge of the sample in approximately 30 s. The mesh silicon surface with a SiO2/SnO2 multilayer film presented in this paper has better wettability and higher capillary pressure than other hydrophilic surfaces reported. The results provide a new way to improve the capillary in microchannels with enhanced super hydrophilic surfaces in microchannels for variety of micro/nanofluidic applications.

KW - Capillary

KW - Layer-by-layer nano self assembly

KW - Nanoparticle

KW - Wetting property

UR - http://www.scopus.com/inward/record.url?scp=79959634914&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79959634914&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2011.04.081

DO - 10.1016/j.snb.2011.04.081

M3 - Article

AN - SCOPUS:79959634914

SN - 0925-4005

VL - 157

SP - 697

EP - 702

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

IS - 2

ER -