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Applications of tapered flat silver halide fibers chemically modified by 12-mercaptododecanoic acid NHS ester for infrared biospectroscopy with prospects for medical diagnostics

Delbeck, S.; Schmitz, B.; Nabers, A.; Gerwert, K.; Habermehl, A.; Lemmer, U.; Heise, H. M.

Abstract (englisch):
Spectroscopic analysis of different body fluids has been realized by using tapered flat silver halide fiber elements as infrared biosensors. Here, a specially functionalized sensor is presented, which had been prepared by an Nhydroxysuccinimide (NHS) ester derivative containing a reactive thiol group. NHS esters are often used as coupling agents to covalently bind amine-containing biomolecules (e.g., enzymes, antibodies or peptides) for the preparation of bioanalytical sensors of high selectivity. Recently, an immuno-infrared-sensor for Alzheimer disease (AD) screening has been presented based on infrared ATR-measurements with antibody-immobilized Ge-element surfaces for the extraction and analysis of Amyloid-beta (Aβ)-monomers, oligomers, and fibrils from blood plasma and cerebrospinal fluid (CSF). Thereby the biomarker amide I maximum frequency was used for AD classification. Here, for functionalizing the silver halide surfaces different procedures have been investigated, which consider the exchange reaction of the halogen atoms by the thiol-group as one option. Other preparation methods use the chemical reduction of silver ions, either from aqueous salt solutions or of the fiber material itself. ... mehr



Zugehörige Institution(en) am KIT Lichttechnisches Institut (LTI)
Publikationstyp Proceedingsbeitrag
Jahr 2019
Sprache Englisch
Identifikator ISBN: 9781510623866
KITopen-ID: 1000099367
Erschienen in Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIX, San Fransisco, CA, February 2-3, 2019. Ed.: I. Gannot
Verlag SPIE, Bellingsham, WA
Seiten 141 – 151
Serie Proceedings of SPIE ; 10872
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