PMID- 36394606
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20221205
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Print)
IS  - 1944-8244 (Linking)
VI  - 14
IP  - 47
DP  - 2022 Nov 30
TI  - Flexible Superhydrophobic Microlens Arrays for Humid Outdoor Environment 
      Applications.
PG  - 53433-53441
LID - 10.1021/acsami.2c17128 [doi]
AB  - A microlens array (MLA) is an essential optical imaging device in the 
      applications of augmented and virtual realities. The imaging of MLA would become 
      blurry in a humid outdoor atmosphere. While the incorporation of 
      superhydrophobicity to MLA would prevent the adhesion of droplets, the complex 
      structure and the multiple fabrication process reduce the capability of optical 
      imaging of MLA. Herein, a flexible superhydrophobic MLA with good optical imaging 
      capability is successfully fabricated by the combination of 3D direct laser 
      writing (DLW) and soft lithography. 3D DLW allows the fabrication of MLA with a 
      hierarchical pillar array (h-MLA) in one step, which ensures good optical 
      properties of the resulting polydimethylsiloxane (PDMS) h-MLA. The resulting 
      h-MLAs with pitches ranging between 50 and 100 mum are superhydrophobic from which 
      water droplets slide away at a sliding angle smaller than 15.6 degrees  and bounce off 
      from the surface. Meanwhile, the hierarchical pillar array has a limited impact 
      on the imaging capability and the field of view of h-MLA. With an optimized pitch 
      of 60 mum, h-MLA has a transparency as good as MLA. Moreover, PDMS h-MLA retains 
      excellent optical and superhydrophobic properties when bent and in an extremely 
      humid environment. We believe that the proposed h-MLA could find applications in 
      outdoor environments.
FAU - Luan, Shiyi
AU  - Luan S
AUID- ORCID: 0000-0001-6334-6058
AD  - School of Power and Mechanical Engineering, Wuhan University, Wuhan430072, China.
FAU - Xu, Peng
AU  - Xu P
AD  - School of Power and Mechanical Engineering, Wuhan University, Wuhan430072, China.
FAU - Zhang, Yurong
AU  - Zhang Y
AD  - The Institute of Technological Sciences, Wuhan University, Wuhan430072, China.
FAU - Xue, Longjian
AU  - Xue L
AUID- ORCID: 0000-0001-5512-747X
AD  - School of Power and Mechanical Engineering, Wuhan University, Wuhan430072, China.
AD  - The Institute of Technological Sciences, Wuhan University, Wuhan430072, China.
FAU - Song, Yi
AU  - Song Y
AUID- ORCID: 0000-0001-9632-404X
AD  - The Institute of Technological Sciences, Wuhan University, Wuhan430072, China.
AD  - School of Microelectronic, Wuhan University, Wuhan430072, China.
FAU - Gui, Chengqun
AU  - Gui C
AD  - The Institute of Technological Sciences, Wuhan University, Wuhan430072, China.
LA  - eng
PT  - Journal Article
DEP - 20221117
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
SB  - IM
PMC - PMC9716522
OTO - NOTNLM
OT  - direct laser writing lithography
OT  - high filling factor
OT  - low roughness
OT  - microlens array
OT  - superhydrophobic
COIS- The authors declare no competing financial interest.
EDAT- 2022/11/18 06:00
MHDA- 2022/11/18 06:01
PMCR- 2022/12/02
CRDT- 2022/11/17 13:53
PHST- 2022/11/18 06:00 [pubmed]
PHST- 2022/11/18 06:01 [medline]
PHST- 2022/11/17 13:53 [entrez]
PHST- 2022/12/02 00:00 [pmc-release]
AID - 10.1021/acsami.2c17128 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2022 Nov 30;14(47):53433-53441. doi: 
      10.1021/acsami.2c17128. Epub 2022 Nov 17.