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09-06-2017
The Use of Functionallized Silk Fibroin Films as a Platform for Optical Diffraction-Based Sensing Applications
Abstract A set of biocompatible, biodegradable, and biofunctionalizable diffractive optical elements (DOEs) using silk proteins as the building materials is reported. The diffraction pattern of a DOE is highly sensitive to the surrounding environment and the structural integrity, offering numerous opportunities for biosensing applications. 0008 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.[ Learn more ]
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09-06-2017
In situ observation of nanotwins formation through twin terrace growth in pulse electrodeposited Cu films
In situ observation of nanotwins formation through twin terrace growth in pulse electrodeposited Cu films Gong ChengHeng LiGaowei XuWei GaiLe Luo... [ Learn more ]
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09-06-2017
Label-free graphene biosensor targeting cancer molecules based on non-covalent modification
A label-free immunosensor based on antibody-modi？ed graphene ？eld effect transistor (GFET) was presented. Antibodies targeting carcinoembryonic antigen (Anti-CEA) were immobilized to the graphene surface via non-covalent modi？cation. [ Learn more ]
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09-06-2017
Absolute quantification of DNA methylation using microfluidic chip-based digital PCR
Hypermethylation of CpG islands in the promoter region of many tumor suppressor genes downregulates their expression and in a result promotes tumorigenesis. Therefore, detection of DNA methylation status is a convenient diagnostic tool for cancer detection. Here, we reported a novel method for the integrative detection of methylation by the microfluidic chip-based digital PCR. This method relies on methylation-sensitive restriction enzyme HpaII, which cleaves the unmethylated DNA strands while keeping the methylated ones intact. [ Learn more ]
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09-06-2017
Experimental Demonstration of In-Plane Negative-Angle Refraction with an Array of Silicon Nanoposts
Controlling an optical beam is fundamental in optics. Recently, unique manipulation of optical wavefronts has been successfully demonstrated by metasurfaces. However, the artificially engineered nanostructures have thus far been limited to operate on light beams propagating out-of-plane. The in-plane operation is critical for on-chip photonic applications. Here, we demonstrate an anomalous negative-angle refraction of a light beam propagating along the plane, by designing a thin dielectric array of silicon nanoposts. The circularly polarized dipoles induced by the high-permittivity nanoposts at the scattering resonance significantly shape the wavefront of the light beam and bend it anomalously. The unique capability of a thin line of the...[ Learn more ]