Optical Biosensor for Quantification of Biomarkers

A special issue of Biosensors (ISSN 2079-6374). This special issue belongs to the section "Biosensor and Bioelectronic Devices".

Deadline for manuscript submissions: closed (30 June 2020) | Viewed by 4964

Special Issue Editor


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Guest Editor
Department of Electrical & Computer Engineering, Iowa State University, Ames, IA 50011, USA
Interests: biomedical microdevices; biosensors; MEMS; microfluidics; nanotechnology

Special Issue Information

Dear Colleagues,

Optical biosensors are known to be powerful tools for the quantification of biological molecules and their interactions. Optical biosensors have shown their enormous potential for diagnosis, environmental monitoring, drug development, and food safety, because of their rapid, easy-to-use, portability, multiplexity, and cost-effective diagnosis. Fluorescence, absorption, reflectance, luminescence, Raman scattering, and refractive index are the main optical transduction mechanisms used for the quantification of biomolecule interactions.  Optical biosensors are widely explored for the analysis of molecular binding kinetics, biomolecules imaging, and label-free detection, and can be easily integrated with an optofluidic detection system and multiplexed with a fluorescence system, as well as plasmonic imaging and smartphone-based diagnostics.

Plasmonic nanostructures of metals by composing nanoparticles, nanoposts, nanoholes, photonic crystals, and other components, with precise control of their structural shapes and sizes, can be integrated with microfluidic settings, and are the essential components for conjugating with specific antibodies, enzymes, and DNA for the detection of a variety of diseases. Unlike electrochemical biosensors, optical biosensors provide several benefits, including electrical non-interference, sensitivity to the picomolar and femtomolar levels of molecules, being highly reproducible as a result of a unique formation of periodic nanostructures, and can be easily be a multi-modal detection unit for parallelization.

In recent years, excellent progress on optical biosensors for health monitoring has shown a great impact in health-care diagnostics. In this Special Issue, our aim is to seek extensive research efforts on optical biosensors for the quantification of biomarkers. For this issue on optical biosensor areas, we invite researchers from scientific, clinical, and engineering disciplines to submit their manuscripts.  

Dr. Azahar Ali
Guest Editor

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Published Papers (1 paper)

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Research

13 pages, 5720 KiB  
Article
Development and Evaluation of the Chromatic Behavior of an Intelligent Packaging Material Based on Cellulose Acetate Incorporated with Polydiacetylene for an Efficient Packaging
by Lina D. Ardila-Diaz, Taíla V. de Oliveira and Nilda de F. F. Soares
Biosensors 2020, 10(6), 59; https://doi.org/10.3390/bios10060059 - 31 May 2020
Cited by 9 | Viewed by 4686
Abstract
Global growth of the food industry and the demand for new products with natural characteristics, safe conditions and traceability have driven researches for the development of technologies such as intelligent packaging, capable to fulfil those needs. Polydiacetylene (PDA) is a synthetic material that [...] Read more.
Global growth of the food industry and the demand for new products with natural characteristics, safe conditions and traceability have driven researches for the development of technologies such as intelligent packaging, capable to fulfil those needs. Polydiacetylene (PDA) is a synthetic material that has been highlighted in research field as a sensor substance, which can be used to produce intelligent packaging capable to detect chemical or biochemical changes in foods and in their environment due to PDA’s color transition from blue to red. This work focused on the development and optimization of an intelligent packaging constituted of a polymeric matrix of cellulose acetate-based incorporated with PDA as the substance sensor. Cellulose acetate films (3% wt.) were developed by a casting method, and the amounts of triethyl citrate plasticizer (TEC) (0–25% wt. of cellulose-acetate) and PDA (0–60 mg) were analyzed to optimize the conditions for the best color transitioning at this study range. The compound amounts incorporated into polymeric matrices were established according to Central Composite Designs (CCD). Three more design variables were analyzed, such as the polymerization time of PDA under UV light exposition (0–60 min), pH values (4–11) and temperature exposure on the film (0–100 °C), important factors on the behavior of PDA’s color changing. In this study, film thickness and film color coordinates were measured in order to study the homogeneity and the color transitioning of PDA films under different pH and temperature conditions, with the purpose of maximizing the color changes through the optimization of PDA and TEC concentrations into the cellulose acetate matrix and the polymerization degree trigged by UV light irradiation. The optimal film conditions were obtained by adding 50.48 g of PDA and 10% of TEC, polymerization time of 18 min under UV light, at 100 °C ± 2 °C of temperature exposure. The changes in pH alone did not statistically influence the color coordinates measured at the analyzed ratio; however, variations in pH associated with other factors had a significant effect on visual color changes, and observations were described. PDA films were optimized to maximize color change in order to obtain a cheap and simple technology to produce intelligent packaging capable to monitor food products along the distribution chain in real time, improving the food quality control and consumer safety. Full article
(This article belongs to the Special Issue Optical Biosensor for Quantification of Biomarkers)
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