Optical sensing of metal tiny particles using ceria nanoparticles via fluorescence quenching technique

被引：0

作者：

Shehata, N. ^{[1
,2
,3
,6
]}

Samir, E. ^{[2
,4
]}

Gaballah, S. ^{[2
,5
]}

Rizk, M. R. M. ^{[2
,4
]}

Mokhtar, B. ^{[2
,4
]}

Azab, M. ^{[2
,7
]}

机构：

[1] Alexandria Univ, Dept Engn Math & Phys, Fac Engn, Alexandria 21544, Egypt

[2] Alexandria Univ, CSNP, SmartCI Res Ctr, Alexandria 21544, Egypt

[3] Utah State Univ, USTAR Bioinnovat Ctr, Logan, UT 84341 USA

[4] Alexandria Univ, Dept Elect Engn, Fac Engn, Alexandria 21544, Egypt

[5] Alexandria Univ, Dept Chem Engn, Fac Engn, Alexandria 21544, Egypt

[6] Kuwait Coll Sci & Technol, Dept Elect Engn, Doha Area, 7th Ring Rd, Kuwait, Kuwait

[7] City Sci Res & Technol Applicat, Informat Res Inst, Alexandria 21934, Egypt

来源：

SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2017 | 2017年 / 10168卷

关键词：

ceria nanoparticles; metallic tiny particles; fluorescence quenching; Stern-Volmer constant; OXYGEN;

D O I：

10.1117/12.2256793

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, ceria nanoparticles are studied as optical probe for different types of metallic tiny particles via fluorescence quenching technique. The synthesized ceria nanoparticles are formed to have charged oxygen vacancies which can be considered the receptors for metal tiny particles to be sensed or adsorbed. Under near-UV excitation, the visible fluorescent emission intensity is found to be reduced with increasing the concentration of tiny particles in the colloidal synthesized nanoparticles' solution. Stern-Volmer constants, which are considered as an indication for the sensitivity to quenchers, have been calculated for the used ceria nanoparticles. This work could be further helpful in many applications such as, sensitive optical sensors in both biomedical and environmental applications.

引用

页数：6

共 16 条

[1] Homogeneous precipitation of cerium dioxide nanoparticles in alcohol/water mixed solvents [J].