Title :
All-optical nanoscale pH meter: a plasmonic nanodevice with quantifiable output
Author :
Bishnoi, Sandra W. ; Levin, Carly S. ; Rozell, Christopher J. ; Johnson, Bruce R. ; Johnson, Don H. ; Halas, Naomi J.
Author_Institution :
Dept. of Biol., Chem. & Phys. Sci., Illinois Inst. of Technol., Chicago, IL
Abstract :
In this paper, we report an all-optical SERS-based nanodevice capable of measuring pH in its local nanoscale vicinity continuously over the range 5.8 to 7.6 pH units. The device consists of an Au nanoshell with a pH sensitive molecular adsorbate functions as a standalone, all-optical nanoscale pH meter that monitors its local environment with an average accuracy of plusmn0.1 pH units across its operating range
Keywords :
chemical sensors; gold; nanoparticles; optical sensors; pH measurement; spectrochemical analysis; surface enhanced Raman scattering; Au; all-optical SERS-based nanoscale pH meter; nanoshell; pH measurement; pH sensitive molecular adsorbate; plasmonic nanodevice; Biomedical measurements; Chemical technology; Gold; Nanobioscience; Nanoscale devices; Nanostructures; Optical scattering; Optical sensors; Plasmons; Raman scattering;
Conference_Titel :
Lasers and Electro-Optics Society, 2006. LEOS 2006. 19th Annual Meeting of the IEEE
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-9555-7
Electronic_ISBN :
0-7803-9555-7
DOI :
10.1109/LEOS.2006.279067
