Abstract
Here, we developed a novel and facile method to control the local water adhesion force of a thin and stretchable superhydrophobic polydimethylsiloxane (PDMS) substrate with micro-pillar arrays that allows the individual manipulation of droplet motions including moving, merging and mixing. When a vacuum pressure was applied below the PDMS substrate, a local dimple structure was formed and the water adhesion force of structure was significantly changed owing to the dynamically varied pillar density. With the help of the lowered water adhesion force and the slope angle of the formed dimple structure, the motion of individual water droplets could be precisely controlled, which facilitated the creation of a droplet-based microfluidic platform capable of a programmable manipulation of droplets. We showed that the platform could be used in newer and emerging microfluidic operations such as surface-enhanced Raman spectroscopy with extremely high sensing capability (10-15 M) and in vitro small interfering RNA transfection with enhanced transfection efficiency of ∼80%.
| Original language | English |
|---|---|
| Article number | 12326 |
| Journal | Scientific reports |
| Volume | 5 |
| DOIs | |
| Publication status | Published - 2015 Jul 23 |
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All Science Journal Classification (ASJC) codes
- General
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Path-programmable water droplet manipulations on an adhesion controlled superhydrophobic surface. / Seo, Jungmok; Lee, Seoung Ki; Lee, Jaehong; Seung Lee, Jung; Kwon, Hyukho; Cho, Seung Woo; Ahn, Jong Hyun; Lee, Taeyoon.
In: Scientific reports, Vol. 5, 12326, 23.07.2015.Research output: Contribution to journal › Article
TY - JOUR
T1 - Path-programmable water droplet manipulations on an adhesion controlled superhydrophobic surface
AU - Seo, Jungmok
AU - Lee, Seoung Ki
AU - Lee, Jaehong
AU - Seung Lee, Jung
AU - Kwon, Hyukho
AU - Cho, Seung Woo
AU - Ahn, Jong Hyun
AU - Lee, Taeyoon
PY - 2015/7/23
Y1 - 2015/7/23
N2 - Here, we developed a novel and facile method to control the local water adhesion force of a thin and stretchable superhydrophobic polydimethylsiloxane (PDMS) substrate with micro-pillar arrays that allows the individual manipulation of droplet motions including moving, merging and mixing. When a vacuum pressure was applied below the PDMS substrate, a local dimple structure was formed and the water adhesion force of structure was significantly changed owing to the dynamically varied pillar density. With the help of the lowered water adhesion force and the slope angle of the formed dimple structure, the motion of individual water droplets could be precisely controlled, which facilitated the creation of a droplet-based microfluidic platform capable of a programmable manipulation of droplets. We showed that the platform could be used in newer and emerging microfluidic operations such as surface-enhanced Raman spectroscopy with extremely high sensing capability (10-15 M) and in vitro small interfering RNA transfection with enhanced transfection efficiency of ∼80%.
AB - Here, we developed a novel and facile method to control the local water adhesion force of a thin and stretchable superhydrophobic polydimethylsiloxane (PDMS) substrate with micro-pillar arrays that allows the individual manipulation of droplet motions including moving, merging and mixing. When a vacuum pressure was applied below the PDMS substrate, a local dimple structure was formed and the water adhesion force of structure was significantly changed owing to the dynamically varied pillar density. With the help of the lowered water adhesion force and the slope angle of the formed dimple structure, the motion of individual water droplets could be precisely controlled, which facilitated the creation of a droplet-based microfluidic platform capable of a programmable manipulation of droplets. We showed that the platform could be used in newer and emerging microfluidic operations such as surface-enhanced Raman spectroscopy with extremely high sensing capability (10-15 M) and in vitro small interfering RNA transfection with enhanced transfection efficiency of ∼80%.
UR - http://www.scopus.com/inward/record.url?scp=84937943212&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84937943212&partnerID=8YFLogxK
U2 - 10.1038/srep12326
DO - 10.1038/srep12326
M3 - Article
C2 - 26202206
AN - SCOPUS:84937943212
VL - 5
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 12326
ER -