Optical sensing and imaging of pH values: Spectroscopies, materials, and applications

A Steinegger, OS Wolfbeis, SM Borisov - Chemical reviews, 2020 - ACS Publications
This is the first comprehensive review on methods and materials for use in optical sensing of
pH values and on applications of such sensors. The Review starts with an introduction that …

Recent advances on intelligent food freshness indicators; an update on natural colorants and methods of preparation

H Almasi, S Forghani, M Moradi - Food Packaging and Shelf Life, 2022 - Elsevier
Consumers' actual demand to be informed on the quality of food items during storage and
transportation drives researchers to focus on new and innovative systems with the ability to …

Optical chemical pH sensors

D Wencel, T Abel, C McDonagh - Analytical chemistry, 2014 - ACS Publications
There has been a consistent increase in output related to the development and application
of optical chemical sensors since∼ 1980. The rise of activity was linked to the major …

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

M Barczak, C McDonagh, D Wencel - Microchimica Acta, 2016 - Springer
This review (with 172 references) highlights the progress made in the past 10 years in silica
sol-gel-based materials for use in optical chemical sensing. Following an introduction, the …

Influence of Phthalein dyes on structural, optical, and sensing properties of zinc oxide supported Silica-titania nanocomposite

S Islam - Spectrochimica Acta Part A: Molecular and …, 2024 - Elsevier
Owed to rapid responsive pH sensing attributes, the zinc-supported Silica-titania (Z/ST)
nanocomposite is synthesized by the sol-gel method. Three distinct pH dyes such as …

Sol–gel based fiber optic pH nanosensor: Structural and sensing properties

S Islam, N Bidin, S Riaz, G Krishnan… - Sensors and Actuators A …, 2016 - Elsevier
Evanescent wave absorption based PCS (plastic clad silica) fiber optic pH sensor is
constructed by encapsulation of indicator dyes in the heterogeneous inorganic hybrid silica …

Fast responsive thermally stable silica microspheres for sensing evaluation: sol–gel approach

S Islam, H Bakhtiar, A Alshoaibi, Z Haider… - Journal of Sol-Gel …, 2020 - Springer
Cetyltrimethylammonium bromide (CTAB) micelle-templated mesoporous SiO 2 particles
(MSPs) are synthesized by sol–gel method. The CTAB templated SiO 2 particles (SPs) …

Mesoporous nanostructures-based fiber optic pH sensors: synthesis, structure-tailoring, physiochemical and sensing stimuli

A Alshoaibi, S Islam - Materials Research Bulletin, 2021 - Elsevier
Owing to opto-chemical sensing, three matrices ie, SiO 2, TiO 2, and SiO 2-TiO 2 are
synthesized and a mixture of four different organic dyes encapsulated in them through the …

Impact of pH on structural and sensing characteristics of cresol red encapsulated polyethylene glycol assisted silica nanomatrix: Sol-gel method

S Islam - Optical Materials, 2021 - Elsevier
Polyethylene glycol-assisted silica nanoparticles (SNPs) matrix is synthesized by the sol-gel
method at a low temperature 60° C. Cresol red is encapsulated in SNPs matrix (CR-SNPs) …

A novel sensitive and fast colorimetric assay for determination of benzidine as a carcinogen aromatic amine based on Bromopyrogallol red

H Tavallali, G Deilamy-Rad, MA Karimi… - International Journal …, 2020 - Taylor & Francis
Benzidine and its derivatives are among human or animal carcinogens. Therefore, there is
an ever-increasing demand for methods suitable for their determination. Herein, we have …