Argon–water DBD pretreatment and vapor‐phase silanization of silica: Comparison with wet‐chemical processes. Issue 7 (23rd March 2020)

• Record Type: Journal Article
• Authors: Klages, Claus‐Peter; Raev, Vitaly; Murugan, Divagar; Sai, Vemulakonda Venkata Raghavendra
• Is Part Of: Plasma processes and polymers. Volume 17:Issue 7(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-03-23
• Subjects: argon–water -- biosensors -- dielectric‐barrier discharges -- plasma pretreatment -- silanization; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.201900265
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract: A dielectric‐barrier discharge (DBD) in an argon–water mixture is applied to plasma pretreatment (PP) of amorphous silica for subsequent vapor‐phase silanization (VS) in the same reactor. Comparison of amino‐silanization of silica fiber‐optic biosensor probes using a PP/VS sequence with strategies involving wet‐chemical pretreatment or silanization shows a considerable improvement in reproducibility by the completely dry process. Practical applicability is demonstrated by an immunoassay with human immunoglobulin G as analyte. Thanks to the advantages of shorter processing time, avoidance of washing steps, and improved reproducibility, PP/VS is highly promising for industrial use. Abstract : A dielectric‐barrier discharge in Ar–H2 O provides H atoms and HO radicals—ideal for pretreatment of SiO2 for vapor‐phase silanization. SiO2 ‐fiber optical biosensor probes are amino‐silanized using a dry process providing the same group density as wet chemistry—with better reproducibility and avoiding chemical hazards. Process viability is demonstrated by immunoassay.