Fabrication of the replica templated from butterfly wing scales with complex light trapping structures》.pdfVIP

Applied Surface Science 355 (2015) 290–297 Contents lists available at ScienceDirect Applied Surface Science j o u rn al h o m e p a g e : w w w. elsev /locate/aps usc Fabrication of the replica templated from butterfly wing scales with complex light trapping structures Zhiwu Han, Bo Li, Zhengzhi Mu, Meng Yang, Shichao Niu ∗ , Junqiu Zhang, Luquan Ren Key Laboratory of Bionic Engineering (Ministry of Education, China),Jilin University, Changchun 130022, PR China a r t i c l e i n f o a b s t r a c t Article history: The polydimethylsiloxane (PDMS) positive replica templated twice from the excellent light trapping sur- Received 13 March 2015 face of butterfly Trogonoptera brookiana wing scales was fabricated by a simple and promising route. Received in revised form 4 July 2015 The exact SiO2 negative replica was fabricated by using a synthesis method combining a sol–gel process Accepted 17 July 2015 and subsequent selective etching. Afterwards, a vacuum-aided process was introduced to make PDMS Available online 20 July 2015 gel fill into the SiO2 negative replica, and the PDMS gel was solidified in an oven. Then, the SiO2 nega- tive replica was used as secondary template and the structures in its surface was transcribed onto the Keywords: surface of PDMS. At last, the PDMS positive replica was obtained. After comparing the PDMS positive Bio-template fabrication Sol–gel