We demonstrate a polymer resonator microfluidic biosensor that overcomes the complex manufacturing procedures required to fabricate traditional devices. In this new format, we show that a gapless light coupling photonic configuration, fabricated in SU8 polymer, can achieve high sensitivity, label-free chemical sensing in solution and high sensitivity biological sensing, at visible wavelengths.

A double series configuration of a microresonator is proposed to measure the amount of corrosion on iron metal. A numerical computation has been performed for analyzing the sensing operation in which the metal is attached to the waveguide as a top cladding material. The transparency peak profile and transfer function of the output transmission spectrum is obtained using a signal flow graph method and Mason's rule. The output spectrum of the microresonator shows that the linear free spectral range (FSR) changes as the iron begins to oxidize, which affects the cladding index of the sensing system. The FSR changes with respect to the amount of corrosion present in iron metal. In addition, the microresonator is able to distinguish two different types of corrosion, which are hematite and magnetite. The ▻ Authors ▻ Keywords Brought to you by INTERNATIONAL ISLAMIC UNIVERSITY MALAYSIA Search Sources Lists ↗ SciVal Create account Sign in References (39) Author keywords all-optical corrosion sensor double-series microresonator refractive index Indexed keywords Engineering controlled terms: Cladding (coating) Hematite Iron Magnetite Metal analysis Refractive index Resonators Signal flow graphs Engineering uncontrolled terms All optical Corrosion sensor Double series Free spectral range Micro resonators Numerical computations Output transmission Types of corrosions Engineering main heading: Corrosion Funding details

Diabetes in general can be classified as Type 1, Type 2, gestational diabetes mellitus that occur during pregnancy, and specific types of diabetes due to certain health condition. Monitoring glucose level is crucial in order to maintain a healthy lifestyle, especially among diabetic patients. Today, researchers looking for a less painful, cheap, and user-friendly noninvasive method to monitor the body glucose level. One of the promising approaches is sweat based glucose detection. In order to calibrate the sensing device, we determined the limit of detection of the glucose concentration in sweat liquid by the well-established enzymatic reaction. This paper will discuss the utilisation of a microplate reader to measure the sensitivity of the chromogenic change in reaction. 50μL of glucose oxidase-peroxidase (GOD-POD) enzyme and 1.67μL glucose sample with different concentrations were mixed in 96 well flat bottom microplate, and the absorbance were detected by using a microplate reader. The absorbance value was used to calculate the concentration. The calculated concentration was compared with the known concentration. From the experimental procedure, the results showed the consistency of calculated and known concentration and R2 = 0.9995

Simple, user-friendly, economical and rapid sensing devices are in urgent demand for diagnostics purposes especially in resource-limited countries. Diagnostics devices fabricated from patterning paper into hydrophilic and hydrophobic regions called paper-based microfluidic analytical devices (μPADs) have been introduced. In this work, straight line handcrafted channel at dimension of 3 mm width have been constructed as an inexpensive method of fabrication for wax and cut μPADs channel. For wax channel, wax hydrophobic channel is drawn on the upper side of the paper and heated for 3 minutes on 100 °C of hotplate for the diffusion of wax into the thickness of paper. 10 different viscosities

Electrical strain gauge has been used widely in many applications, such as experimental strength of materials and structural health monitoring because of their low cost and durability in making measurements. Recently, a few new sensors have been developed using the constantan alloy to enhance the sensor's response and sensitivity. However, researchers have noticed that electrical conductive paints alternate their electrical resistance when subjected tomechanical strain. This