Path-programmable water droplet manipulations on an adhesion controlled superhydrophobic surface

Jungmok Seo; Seoung Ki Lee; Jaehong Lee; Jung Seung Lee; Hyukho Kwon; Seung Woo Cho; Jong Hyun Ahn; Taeyoon Lee

doi:10.1038/srep12326

Path-programmable water droplet manipulations on an adhesion controlled superhydrophobic surface

Jungmok Seo, Seoung Ki Lee, Jaehong Lee, Jung Seung Lee, Hyukho Kwon, Seung Woo Cho, Jong Hyun Ahn, Taeyoon Lee

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

55 Citations (Scopus)

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	https://doi.org/10.1038/srep12326
Publication status	Published - 2015 Jul 23

Bibliographical note

Funding Information:
This work was supported by the grant (2012-0006689, 2014R1A2A2A09053061, CASE-2014M3A6A5060933 and 2013R1A1A2A10061422) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology. This work was partially supported by the Yonsei University Future-leading Research Initiative. We thank the Tanaka Kikinzoku Kogyo K.K. for comments on the usage of silver nanoparticles.

All Science Journal Classification (ASJC) codes

General

Access to Document

10.1038/srep12326

Cite this

@article{2f03e15bbfa645beb2e1b1c573293a6f,

title = "Path-programmable water droplet manipulations on an adhesion controlled superhydrophobic surface",

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%.",

author = "Jungmok Seo and Lee, {Seoung Ki} and Jaehong Lee and {Seung Lee}, Jung and Hyukho Kwon and Cho, {Seung Woo} and Ahn, {Jong Hyun} and Taeyoon Lee",

note = "Funding Information: This work was supported by the grant (2012-0006689, 2014R1A2A2A09053061, CASE-2014M3A6A5060933 and 2013R1A1A2A10061422) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology. This work was partially supported by the Yonsei University Future-leading Research Initiative. We thank the Tanaka Kikinzoku Kogyo K.K. for comments on the usage of silver nanoparticles.",

year = "2015",

month = jul,

day = "23",

doi = "10.1038/srep12326",

language = "English",

volume = "5",

journal = "Scientific Reports",

issn = "2045-2322",

publisher = "Nature Publishing Group",

}

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

N1 - Funding Information: This work was supported by the grant (2012-0006689, 2014R1A2A2A09053061, CASE-2014M3A6A5060933 and 2013R1A1A2A10061422) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology. This work was partially supported by the Yonsei University Future-leading Research Initiative. We thank the Tanaka Kikinzoku Kogyo K.K. for comments on the usage of silver nanoparticles.

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 -

Path-programmable water droplet manipulations on an adhesion controlled superhydrophobic surface

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this