Vapor Sensing Using Conjugated Molecule-Linked Au Nanoparticles in a Silica Matrix

المؤلفون المشاركون

Washburn, Cody
Howell, Stephen W.
Price, B. Katherine
Tour, James M.
Simonson, R. Joseph
Wheeler, David R.
Whiting, Joshua
Fan, Hongyou
Dirk, Shawn M.

المصدر

Journal of Nanomaterials

العدد

المجلد 2009، العدد 2009 (31 ديسمبر/كانون الأول 2009)، ص ص. 1-9، 9ص.

الناشر

Hindawi Publishing Corporation

تاريخ النشر

2008-12-30

دولة النشر

مصر

عدد الصفحات

9

التخصصات الرئيسية

العلوم الهندسية و تكنولوجيا المعلومات
الكيمياء
هندسة مدنية

الملخص EN

Cross-linked assemblies of nanoparticles are of great value as chemiresistor-type sensors.

Herein, we report a simple method to fabricate a chemiresistor-type sensor that minimizes the swelling transduction mechanism while optimizing the change in dielectric response.

Sensors prepared with this methodology showed enhanced chemoselectivity for phosphonates which are useful surrogates for chemical weapons.

Chemoselective sensors were fabricated using an aqueous solution of gold nanoparticles that were then cross-linked in the presence of the silica precursor, tetraethyl orthosilicate with the α-, ω-dithiolate (which is derived from the in situ deprotection of 1,4-di(Phenylethynyl-4′,4″-diacetylthio)-benzene (1) with wet triethylamine).

The cross-linked nanoparticles and silica matrix were drop coated onto interdigitated electrodes having 8 μm spacing.

Samples were exposed to a series of analytes including dimethyl methylphosphonate (DMMP), octane, and toluene.

A limit of detection was obtained for each analyte.

Sensors assembled in this fashion were more sensitive to dimethyl methylphosphonate than to octane by a factor of 1000.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Dirk, Shawn M.& Howell, Stephen W.& Price, B. Katherine& Fan, Hongyou& Washburn, Cody& Wheeler, David R.…[et al.]. 2008. Vapor Sensing Using Conjugated Molecule-Linked Au Nanoparticles in a Silica Matrix. Journal of Nanomaterials،Vol. 2009, no. 2009, pp.1-9.
https://search.emarefa.net/detail/BIM-474982

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Dirk, Shawn M.…[et al.]. Vapor Sensing Using Conjugated Molecule-Linked Au Nanoparticles in a Silica Matrix. Journal of Nanomaterials No. 2009 (2009), pp.1-9.
https://search.emarefa.net/detail/BIM-474982

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Dirk, Shawn M.& Howell, Stephen W.& Price, B. Katherine& Fan, Hongyou& Washburn, Cody& Wheeler, David R.…[et al.]. Vapor Sensing Using Conjugated Molecule-Linked Au Nanoparticles in a Silica Matrix. Journal of Nanomaterials. 2008. Vol. 2009, no. 2009, pp.1-9.
https://search.emarefa.net/detail/BIM-474982

نوع البيانات

مقالات

لغة النص

الإنجليزية

الملاحظات

Includes bibliographical references

رقم السجل

BIM-474982