INTEGRATED OPTIC BIOSENSOR FOR ENVIRONMENTAL MONITORING

Date

1992-01-01

Author

BOIARSKI, AA
RIDGWAY, RW
BUSCH, JR
Sayan, Gönül
MILLER, LS

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

37
views

0
downloads

An integrated-optic biosensor monitors the concentration of liquid pollutants on the surface of a planar substrate comprising single-mode channel waveguides. The concept uses a MachZehnder interferometer structure to measure thickness and/or refractive index changes on the waveguide surface. These changes occur as pollutant molecules interact directly with the interferometer's active arm or with a hydrophobic coating on the surface of the arm. Interferometer output data were obtained for various solutions including PPM levels of benzene and toluene in water. Theoretical analysis indicated that a hydrophobic coating on the waveguide would provide sensor specificity and detect pollutants at PPB levels.

Subject Keywords

Chemistry, multidisciplinary, Engineering, biomedical, Optics, Spectroscopy

URI

https://hdl.handle.net/11511/42969

DOI

https://doi.org/10.1117/12.56539

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Nanoparticle self-assembly at the interface of liquid crystal droplets Rahimi, Mohammad; Roberts, Tyler F; Armas-Pérez, Julio C; Wang, Xiaoguang; Büküşoğlu, Emre; Abbott, Nicholas L; de Pablo, Juan Jose (Proceedings of the National Academy of Sciences, 2015-04-28) Nanoparticles adsorbed at the interface of nematic liquid crystals are known to form ordered structures whose morphology depends on the orientation of the underlying nematic field. The origin of such structures is believed to result from an interplay between the liquid crystal orientation at the particles' surface, the orientation at the liquid crystal's air interface, and the bulk elasticity of the underlying liquid crystal. In this work, we consider nanoparticle assembly at the interface of nematic drople...
Analysis of the Raman intensities near the phase transitions in ammonium halides Yurtseven, Hasan Hamit (Elsevier BV, 2008-12-01) This study concentrates on the temperature dependence of the Raman intensities for the lattice modes in ammonium halides (NH4Cl and NH4Br) close to phase transitions, We predict their intensities using the results of a shell model for the Raman polarizability within the framework of an Ising pseudospin-phonon coupled model.
Implementation and comparison of reconstruction algorithms for magnetic resonance-electric impedance tomography (mr-eit) Martin Lorca, Dario; Eyüboğlu, Behçet Murat; Department of Biomedical Engineering (2007) In magnetic resonance electrical impedance tomography (MR-EIT), crosssectional images of a conductivity distribution are reconstructed. When current is injected to a conductor, it generates a magnetic field, which can be measured by a magnetic resonance imaging (MRI) scanner. MR-EIT reconstruction algorithms can be grouped into two: current density based reconstruction algorithms (Type-I) and magnetic flux density based reconstruction algorithms (Type-II). The aim of this study is to implement a series of r...
Analysis of the Raman frequencies close to the lambda-phase transition in NH4Cl Yurtseven, Hasan Hamit (Elsevier BV, 2007-05-27) This study gives our analysis of the Raman frequencies for the lattice modes of v(5)TO(174 cm(-1)), v(5)TO(144 cm(-1)) and v(7)TA(93 cm(-1)), and an internal mode of v(2)(1708 cm(-1)) as functions of temperature in NH4Cl close to its lambda-phase transition (T-lambda = 241.2 K, P = 0). This analysis is performed using a power-law formula with the critical exponent beta for the order parameter according to the soft mode-hard mode coupling model.
A mechanism for the enhanced attachment and proliferation of fibroblasts on anodized 316L stainless steel with nano-pit arrays Ni, Siyu; Sun, Linlin; Ercan, Batur; Liu, Luting; Ziemer, Katherine; Webster, Thomas J. (Wiley, 2014-08-01) In this study, 316L stainless steel with tunable nanometer pit sizes (0, 25, 50, and 60 nm) were fabricated by an anodization procedure in an ethylene glycol electrolyte solution containing 5 vol % perchloric acid. The surface morphology and elemental composition of the 316L stainless steel were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). The nano-pit arrays on all of the 316L stainless steel samples were in a regular arrang...

Citation Formats

A. BOIARSKI, R. RIDGWAY, J. BUSCH, G. Sayan, and L. MILLER, “INTEGRATED OPTIC BIOSENSOR FOR ENVIRONMENTAL MONITORING,” 1992, vol. 1587, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42969.