33 as shown in Figure 7b. Despite the similar coating layers on the same PC substrate and the same refractive index, NHA configuration does exhibit one important feature of shifted peak of reflection and can potentially function as an ultrasensitive sensing device. Figure 7 Reflection spectra of mirror surface and nanohole array (NHA) structure with metallic and dielectric coating

layers. Simulated and experimentally measured reflection for (a) mirror surface and (b) NHA structure at normal incidence angle, respectively. Conclusions In summary, a versatile and rapid process is presented based on the well-established injection nanomolding of PC polymer for the controlled nanotexturing of NHA surfaces over large areas with tunable depth topography. selleck compound In addition, with the change of master Ni stamp, feature size diameter and density/periodicity can also be adjusted accordingly. The NHA-engineered surfaces exhibit Protein Tyrosine Kinase inhibitor a functional optical property that can be optimized for anti-reflection coatings. The proposed technology of rapidly replicated NHA surfaces may be used for efficient and cost-effective

solar cells, highly light extracted light-emitting diodes (LED) and self-cleaning surfaces. The scalability of the process can be sufficiently addressed due to the reduced O-methylated flavonoid cycle time of 4 s and is fully compatible with the well-established mass production of DVD/BD industries. This work presents an important advance in the rapidly growing field of nanomanufacturing. Furthermore, we have also experimentally demonstrated an approach to quantitatively control transmission of light through NHA and multilayer coating of both dielectric and metallic layers with the potential use of sensing applications. The future work can be extended to the transmission of light through current NHA/multilayer structures and geometry-dependent selectivity in terms of both frequency and resonant width.

Acknowledgement This work was supported by the Taiwan National Science Council under contract no. NSC 101-2221-E-008-014 and NSC 102-2221-E-008 -067. References 1. Fan Z, Razavi H, Do J-W, Moriwaki A, Ergen O, Chueh Y-L, Leu PW, Ho JC, Takahashi T, Reichertz LA, Neale S, Yu K, Wu M, Ager JW, Javey A: Three-dimensional nanopillar-array photovoltaics on low-cost and flexible substrates. Nat Mater 2009, 8:648–653.CrossRef 2. Kelzenberg MD, Boettcher SW, Petykiewicz JA, Turner-Evans DB, Putnam MC, Warren EL, Spurgeon JM, Briggs RM, Lewis NS, Atwater HA: Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications. Nat Mater 2010, 9:368.CrossRef 3. Blossey R: Self-cleaning surfaces–virtual realities. Nat Mater 2003, 2:301–306.CrossRef 4.