Planar nitric oxide (NO)-selective ultramicroelectrode sensor for measuring localized NO surface concentrations at xerogel microarrays

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发布日期 2005-11-30

DOI 10.1039/B507981K

影响因子 4.616

作者

Bong Kyun Oh, Mary E. Robbins, Mark H. Schoenfisch

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摘要

A planar ultramicroelectrode nitric oxide (NO) sensor was fabricated to measure the local NO surface concentrations from NO-releasing microarrays of varying geometries. The sensor consisted of platinized Pt (25 µm) working electrode and a silver paint reference electrode coated with a thin silicone rubber gas permeable membrane. An internal hydrogel layer separated the Pt working electrode and gas permeable membrane. The total diameter of the sensor was ≤50 µm, and demonstrated negligible analyte trapping effects. The sensitivity and response time of the ultramicroelectrode sensor to NO were 0.19 ± 0.07 pA nM−1 and 1–4 s, respectively, with a 5 nM limit of detection. The sensor was employed to correlate the steady-state NO surface concentration and observed platelet adhesion resistance. Results indicate that the required steady-state NO concentration necessary to inhibit platelet adhesion to the micropatterned xerogels depends on the xerogel geometry.

期刊推荐

Acta Metallurgica Sinica-English Letters

Critical Reviews in Solid State and Materials Sciences

Cellulose

Main Group Chemistry

Journal of Asian Natural Products Research

Heteroatom Chemistry

Atomization and Sprays

Colloid Journal

Chinese Journal of Chemistry

Polycyclic Aromatic Compounds

来源期刊

Analyst

CiteScore: 7.8

自引率: 5.6%

年发文量: 653

Analyst publishes analytical and bioanalytical research that reports premier fundamental discoveries and inventions, and the applications of those discoveries, unconfined by traditional discipline barriers.

Planar nitric oxide (NO)-selective ultramicroelectrode sensor for measuring localized NO surface concentrations at xerogel microarrays

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