Optical fiber dissolved oxygen sensor based on Pt(II) complex and core-shell silica nanoparticles incorporated with sol–gel matrix

Tuning oxygen sensitivity of ruthenium complex exploiting silver nanoparticles

“…The calibration plots were nonlinear within the measured oxygen concentrations [15]. Not only the ruthenium based dyes but also other transition metal complexes and porphyrin derivatives developed to date exhibit nonlinear calibration data or Stern-Volmer plots especially for the large working ranges [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][20][21][22][23][24][25]. This is due to the uncontrollable high sensitivity of the exploited dyes towards oxygen.…”

Design of Nanostructured Functional Coatings by Using Wet-Chemistry Methods

“…These nanostructured coatings make possible an enhancement in the response time as well as in the resultant sensitivity [114][115][116][117][118][119][120][121]. In addition, the presence of nanoparticles in these sensitive thin films has resulted in the design of high-performance fiber-optic sensors due to the inherent properties of the nanoparticles such as high surface area ratio and porosity [122][123][124][125][126]. Among them, the use of metallic nanoparticles for sensing applications is of great interest due to the presence of strong absorption bands in the visible region, known as Localized Surface Plasmon Resonances (LSPR) [127].…”

Micro- and nanostructured sol-gel-based materials for optical chemical sensing (2005–2015)

“…Chu et al also described a fibrebased O 2 sensor with enhanced sensitivity. The authors exploited PtTFPP and core-shell silica nanoparticles (NPs) or metal coated silica NPs entrapped within OctylTEOS-TEOSbased matrix [79][80][81].…”