start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=22 article-no= start-page=3306 end-page=3309 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=2009 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Fabricating small-scale, curved, polymeric structures with convex and concave menisci through interfacial free energy equilibrium en-subtitle= kn-subtitle= en-abstract= kn-abstract=Polymeric curved structures are widely used in imaging systems including optical fibers and microfluidic channels. Here, we demonstrate that small-scale, poly(dimethylsiloxane) (PDMS)-based, curved structures can be fabricated through controlling interfacial free energy equilibrium. Resultant structures have a smooth, symmetric, curved surface, and may be convex or concave in form based on surface tension balance. Their curvatures are controlled by surface characteristics (i.e., hydrophobicity and hydrophilicity) of the molds and semi-liquid PDMS. In addition, these structures are shown to be biocompatible for cell culture. Our system provides a simple, efficient and economical method for generating integrateable optical components without costly fabrication facilities. en-copyright= kn-copyright= en-aut-name=ChengChao-Min en-aut-sei=Cheng en-aut-mei=Chao-Min kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MatsuuraKoji en-aut-sei=Matsuura en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=WangI-Jan en-aut-sei=Wang en-aut-mei=I-Jan kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KurodaYuka en-aut-sei=Kuroda en-aut-mei=Yuka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=LeDucPhilip R. en-aut-sei=LeDuc en-aut-mei=Philip R. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=NaruseKeiji en-aut-sei=Naruse en-aut-mei=Keiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=Departments of Mechanical and Biomedical Engineering and Biological Sciences, Carnegie Mellon University affil-num=2 en-affil= kn-affil=Research Core for Interdisciplinary Sciences, Okayama University affil-num=3 en-affil= kn-affil=Departments of Mechanical and Biomedical Engineering and Biological Sciences, Carnegie Mellon University affil-num=4 en-affil= kn-affil=Research Core for Interdisciplinary Sciences, Okayama University affil-num=5 en-affil= kn-affil=Departments of Mechanical and Biomedical Engineering and Biological Sciences, Carnegie Mellon University affil-num=6 en-affil= kn-affil=Cardiovascular Physiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University END