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The article focuses on a study related to the three-dimensional analyte-sensitive nanostructures of holographic sensors and their application in industrial settings, research, and among public. Topics discussed include demonstration of how holographic sensing is apt for a body of sensing mechanisms, the role of Optical sensors in environment monitoring, and the development of sensors by combining optical properties of photonic crystals and quantum dots.

We computationally and experimentally demonstrate enhanced reflection effects displayed by silicon-based inverted nanocone arrays. A 3D finite element model is used to characterize the optical properties of the nanocone arrays with respect to the change in polarization and incident angles. The nanocone arrays are fabricated by e-beam lithography in hexagonal and triangular geometries with a lattice constant of 300 nm. The fabricated devices show a two-fold increase in reflection compared with bare silicon surface, as well as a strong diffraction within the visible and nearinfrared spectra. The nanocone arrays may find a variety of applications from optical devices to energy conservation technologies. [ABSTRACT FROM AUTHOR]

Abstract: A smartphone application algorithm with inter-phone repeatability was developed for both Android and iOS operating systems. The app transformed the smartphone into a reader to quantify commercial colorimetric urine tests with high accuracy and reproducibility in measuring pH, protein, and glucose. The results showed linear responses in the ranges of 5.0–9.0, 0–100mg/dL and 0–300mg/dL, respectively. [Copyright &y& Elsevier]