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Chemosensors
Special Issues
Photonic Sensors for Biological and Chemical Measurements
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Photonic Sensors for Biological and Chemical Measurements

A special issue of Chemosensors (ISSN 2227-9040).

Deadline for manuscript submissions: closed (15 April 2014) | Viewed by 23448

Special Issue Editors

Prof. Dr. Yu-Lung Lo

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Institute of Nanotechnology and Microsystem Engineering, National Cheng Kung University, Tainan 70101, Taiwan
Interests: optical sensors; quantum dots sensors; nanostructures for chemical sensing; fluorescence sensors; biosensors
Dr. Julian Chi Chiu Chan

E-Mail Website
Guest Editor
Division of Bioengineering, School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore 637457, Singapore
Interests: optical chemical sensing; optical bio-sensing; optical sensing devices; optical signal processing; medical image processing; optical image processing

Special Issue Information

Dear Colleagues,

The guided wave optics device for photonic sensors (including optical fiber sensors, planar waveguide sensors, and optical sensors) has been intensively studied over two decades for applications in biological and chemical measurements. Photonic sensors may be built based on different mechanisms such as intensity-based, phase-based, polarization-based, wavelength-based, Raman scattering-based, spectroscopic, surface plasmon resonance, and fluorescence emitted types. Progress in designing photonic sensors continues with new mechanism and guided wave optics device in different new fields. Thus, the special issue of journal of Chemosensors includes:

  • sensors based on optics/planar waveguide/ novel fibers including photonic crystal fiber, photonic bandgap fiber, and other specialty fiber like micro-nano fiber
  • novel demodulation techniques
  • applications in relatively new areas such as biomedical engineering and chemical engineering.

This special issue will give the reader some of the exciting areas of photonic sensors with this collection of innovative research articles. There will be no fees for all manuscripts in this special issue.

Prof. Dr. Yu-Lung Lo
Dr. Julian Chi Chiu Chan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Chemosensors is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.


Published Papers (3 papers)

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Research

352 KiB  
Article
Photonic Crystal-Based Sensing and Imaging of Potassium Ions
by Christoph Fenzl, Michael Kirchinger, Thomas Hirsch and Otto S. Wolfbeis
Chemosensors 2014, 2(3), 207-218; https://doi.org/10.3390/chemosensors2030207 - 18 Sep 2014
Cited by 15 | Viewed by 6945
Abstract
We report on a method for selective optical sensing and imaging of potassium ions using a sandwich assembly composed of layers of photonic crystals and an ion-selective membrane. This represents a new scheme for sensing ions in that an ionic strength-sensitive photonic crystal [...] Read more.
We report on a method for selective optical sensing and imaging of potassium ions using a sandwich assembly composed of layers of photonic crystals and an ion-selective membrane. This represents a new scheme for sensing ions in that an ionic strength-sensitive photonic crystal hydrogel layer is combined with a K+-selective membrane. The latter consists of plasticized poly(vinyl chloride) doped with the K+-selective ion carrier, valinomycin. The film has a red color if immersed into plain water, but is green in 5 mM KCl and purple at KCl concentrations of 100 mM or higher. This 3D photonic crystal sensor responds to K+ ions in the 1 to 50 mM concentration range (which includes the K+ concentration range encountered in blood) and shows high selectivity over ammonium and sodium ions. Sensor films were also imaged with a digital camera by exploiting the RGB technique. Full article
(This article belongs to the Special Issue Photonic Sensors for Biological and Chemical Measurements)
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808 KiB  
Article
Discriminating Bacteria with Optical Sensors Based on Functionalized Nanoporous Xerogels
by Sabine Crunaire, Pierre R. Marcoux, Khanh-Quyen Ngo, Jean-Pierre Moy, Frédéric Mallard and Thu-Hoa Tran-Thi
Chemosensors 2014, 2(2), 171-181; https://doi.org/10.3390/chemosensors2020171 - 11 Jun 2014
Cited by 8 | Viewed by 7605
Abstract
An innovative and low-cost method is proposed for the detection and discrimination of indole-positive pathogen bacteria. The method allows the non-invasive detection of gaseous indole, released by bacteria, with nanoporous colorimetric sensors. The innovation comes from the use of nanoporous matrices doped with [...] Read more.
An innovative and low-cost method is proposed for the detection and discrimination of indole-positive pathogen bacteria. The method allows the non-invasive detection of gaseous indole, released by bacteria, with nanoporous colorimetric sensors. The innovation comes from the use of nanoporous matrices doped with 4-(dimethylamino)-cinnamaldehyde, which act as sponges to trap and concentrate the targeted analyte and turn from transparent to dark green, long before the colonies get visible with naked eyes. With such sensors, it was possible to discriminate E. coli from H. alvei, two indole-positive and negative bacteria after seven hours of incubation. Full article
(This article belongs to the Special Issue Photonic Sensors for Biological and Chemical Measurements)
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632 KiB  
Article
A Low-Cost Fluorescent Sensor for pCO2 Measurements
by Xudong Ge, Yordan Kostov, Robert Henderson, Nicholas Selock and Govind Rao
Chemosensors 2014, 2(2), 108-120; https://doi.org/10.3390/chemosensors2020108 - 03 Apr 2014
Cited by 10 | Viewed by 8335
Abstract
Global warming is believed to be caused by increasing amounts of greenhouse gases (mostly CO2) discharged into the environment by human activity. In addition to an increase in environmental temperature, an increased CO2 level has also led to ocean acidification. [...] Read more.
Global warming is believed to be caused by increasing amounts of greenhouse gases (mostly CO2) discharged into the environment by human activity. In addition to an increase in environmental temperature, an increased CO2 level has also led to ocean acidification. Ocean acidification and rising temperatures have disrupted the water’s ecological balance, killing off some plant and animal species, while encouraging the overgrowth of others. To minimize the effect of global warming on local ecosystem, there is a strong need to implement ocean observing systems to monitor the effects of anthropogenic CO2 and the impacts thereof on ocean biological productivity. Here, we describe the development of a low-cost fluorescent sensor for pCO2 measurements. The detector was exclusively assembled with low-cost optics and electronics, so that it would be affordable enough to be deployed in great numbers. The system has several novel features, such as an ideal 90° separation between excitation and emission, a beam combiner, a reference photodetector, etc. Initial tests showed that the system was stable and could achieve a high resolution despite the low cost. Full article
(This article belongs to the Special Issue Photonic Sensors for Biological and Chemical Measurements)
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