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The present work demonstrates development of a miniaturized plasmonic platform comprised of a Au nanohole array (NHA) on a Si/Si3N4 substrate. Plasmonic responses of the NHA platform, which is coated with Cu-benzenetricarboxylate metal organic framework (MOF), are found to be promising even towards 500 nmol mol-1 (ppb) of acetone or ethanol vapors at room temperature. The sensing characteristics are further investigated by varying the operating temperature (296 K to 318 K) of the sensor and the concentrations of vapors (500 nmol mol-1 to 320 μmol mol-1). The plasmonic responses for the sensors are correlated with the adsorption of vapors on the MOF surface and modeled in accordance to Langmuir-type adsorption. Kinetic parameters are estimated for the adsorption of fixed concentrations of acetone and ethanol vapors within the studied operating temperature range. The linear variation of characteristic response time constants with the operating temperature provides Arrhenius activation energies for the adsorption of acetone and ethanol vapors. The comparatively lower activation energy estimated for the adsorption of ethanol results in faster and more sensitive response of the sensor towards that analyte. The plasmonic sensor for the detection of nmol mol-1 level acetone and ethanol vapors at room temperature along with the kinetic correlation on plasmonic response with the adsorption of the analytes described herein offer new insights to existing reports on surface modification and plasmonic detection.
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Photonic crystals and plasmonic nanohole arrays are the conventional substrates for label-free biodetection applications. In this article, we readdressed these systems in terms of their sensing capabi...
In this research we introduce a plasmonic nanoparticle based optical biosensor for monitoring of molecular binding events. The sensor utilizes spotted gold nanoparticle arrays as sensing platform. The...
A color-sensitive and spectrometer-free sensing method using plasmonic nanohole arrays and the color components, L* , a* , and b* , of the CIELAB defined by the international commission on illum...
Point-of-care (POC) applications have expanded hugely in recent years and is likely to continue, with an aim to deliver cheap, portable, and reliable devices to meet the demands of healthcare industry...
In this paper, a plasmonic nanosensor, by using a nanorod array in a square resonator coupled with two slot cavities, with properties for the detection of glucose concentration in water, is proposed a...
By integrating a miniaturized pulse oximetry sensor into the frame of oxygen delivery glasses which dissimulates the nasal cannula we hope to optimize and long term oxygen therapy (LTOT) r...
This study is an observational study which seeks to examine a) the accuracy of the Clarity Renal Monitoring System (Clarity RMS)® sensor kit at the bedside compared to manual urine output...
The clinical trial entitled "Detection of upper gastrointestinal (GI) bleeding with a novel bleeding sensor capsule - a pilot study" was carried out in a monocentric clinical trial with 30...
The Double Sensor examined in this trial was developed by Dräger Company and is a novel non- invasive device for assessing core body temperature. In a preliminary research investigators h...
Hypo Sense is a non- invasive method for detection of hypoglycemia. The Hypo Sense combines an array of non-invasive sensors which monitors the patient's physiological parameters (heart & ...
Detection of drugs that have been abused, overused, or misused, including legal and illegal drugs. Urine screening is the usual method of detection.
The substances beta-hydroxybutyric acid, acetoacetic acid, and acetone, which are produced by fatty acid and carbohydrate metabolism in the liver in approximately a 78:20:2 ratio. Acetoacetate is produced from acetyl-CoA. Most is enzymatically converted to beta-ketobutyrate, but a small amount is spontaneously decarboxylated to acetone. The ketone bodies can be used as fuels by muscle and brain tissue. In starvation and uncontrolled diabetes mellitus, large quantities are produced, causing metabolic acidosis and elevated blood and urine levels of all three ketone bodies. (Dorland, 28th ed)
The simultaneous analysis of multiple samples of TISSUES or CELLS from BIOPSY or in vitro culture that have been arranged in an array format on slides or microchips.
Therapeutic cult concerned with intangible energies surrounding the living body and based on the detection of these intrinsic radiations by dowsing, or divining, or the use of more elaborate instruments (radionics).
Ascertaining of deception through detection of emotional disturbance as manifested by changes in physiologic processes usually using a polygraph.
A diagnostic test is any kind of medical test performed to aid in the diagnosis or detection of disease. For example: to diagnose diseases to measure the progress or recovery from disease to confirm that a person is free from disease Clin...