PMID- 37763905
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231003
IS  - 2072-666X (Print)
IS  - 2072-666X (Electronic)
IS  - 2072-666X (Linking)
VI  - 14
IP  - 9
DP  - 2023 Sep 6
TI  - Femtosecond Laser Direct Writing of Gecko-Inspired Switchable Adhesion Interfaces 
      on a Flexible Substrate.
LID - 10.3390/mi14091742 [doi]
LID - 1742
AB  - Biomimetic switchable adhesion interfaces (BSAIs) with dynamic adhesion states 
      have demonstrated significant advantages in micro-manipulation and bio-detection. 
      Among them, gecko-inspired adhesives have garnered considerable attention due to 
      their exceptional adaptability to extreme environments. However, their high 
      adhesion strength poses challenges in achieving flexible control. Herein, we 
      propose an elegant and efficient approach by fabricating three-dimensional 
      mushroom-shaped polydimethylsiloxane (PDMS) micropillars on a flexible PDMS 
      substrate to mimic the bending and stretching of gecko footpads. The fabrication 
      process that employs two-photon polymerization ensures high spatial resolution, 
      resulting in micropillars with exquisite structures and ultra-smooth surfaces, 
      even for tip/stem ratios exceeding 2 (a critical factor for maintaining adhesion 
      strength). Furthermore, these adhesive structures display outstanding resilience, 
      enduring 175% deformation and severe bending without collapse, ascribing to the 
      excellent compatibility of the micropillar's composition and physical properties 
      with the substrate. Our BSAIs can achieve highly controllable adhesion force and 
      rapid manipulation of liquid droplets through mechanical bending and stretching 
      of the PDMS substrate. By adjusting the spacing between the micropillars, precise 
      control of adhesion strength is achieved. These intriguing properties make them 
      promising candidates for various applications in the fields of microfluidics, 
      micro-assembly, flexible electronics, and beyond.
FAU - Zhang, Zhiang
AU  - Zhang Z
AD  - Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China.
FAU - He, Bingze
AU  - He B
AD  - Institute of Medical Robotics, School of Biomedical Engineering, Shanghai Jiao 
      Tong University, Shanghai 200240, China.
FAU - Han, Qingqing
AU  - Han Q
AD  - Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China.
FAU - He, Ruokun
AU  - He R
AD  - Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China.
FAU - Ding, Yuxuan
AU  - Ding Y
AD  - Institute of Medical Robotics, School of Biomedical Engineering, Shanghai Jiao 
      Tong University, Shanghai 200240, China.
FAU - Han, Bing
AU  - Han B
AUID- ORCID: 0000-0001-9763-0372
AD  - Institute of Medical Robotics, School of Biomedical Engineering, Shanghai Jiao 
      Tong University, Shanghai 200240, China.
FAU - Ma, Zhuo-Chen
AU  - Ma ZC
AUID- ORCID: 0000-0002-0207-6039
AD  - Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China.
AD  - Institute of Medical Robotics, School of Biomedical Engineering, Shanghai Jiao 
      Tong University, Shanghai 200240, China.
LA  - eng
GR  - Nos. 62205200 and 62005141/National Natural Science Foundation of China/
GR  - 22ZR1431600/Natural Science Foundation of Shanghai/
GR  - 2021SHZDZX/Shanghai Municipal Science and Technology Major Project/
PT  - Journal Article
DEP - 20230906
PL  - Switzerland
TA  - Micromachines (Basel)
JT  - Micromachines
JID - 101640903
PMC - PMC10534918
OTO - NOTNLM
OT  - mushroom-shaped micropillars
OT  - switchable adhesion
OT  - two-photon polymerization
COIS- The authors declare no conflict of interest.
EDAT- 2023/09/28 06:43
MHDA- 2023/09/28 06:44
PMCR- 2023/09/06
CRDT- 2023/09/28 01:29
PHST- 2023/08/09 00:00 [received]
PHST- 2023/08/31 00:00 [revised]
PHST- 2023/09/04 00:00 [accepted]
PHST- 2023/09/28 06:44 [medline]
PHST- 2023/09/28 06:43 [pubmed]
PHST- 2023/09/28 01:29 [entrez]
PHST- 2023/09/06 00:00 [pmc-release]
AID - mi14091742 [pii]
AID - micromachines-14-01742 [pii]
AID - 10.3390/mi14091742 [doi]
PST - epublish
SO  - Micromachines (Basel). 2023 Sep 6;14(9):1742. doi: 10.3390/mi14091742.