Evaluation of a cost-effective roadside sensor platform for identifying high emitters

Potential of zinc oxide nanowires for developing a sensitive opto-electronic platform was demonstrated. Zinc oxide nanowires synthesized on insulating sapphire substrates were functionalized with an optically active receptor, 1-pyrenebutyric acid. Appropriate characterization studies including XPS and FT-IR ATR are reported. I-V curves of pristine and receptor-modified nanowires were utilized to highlight the potential of zinc oxide nano-heterostructures for developing a sensitive opto-electronic platform for p-nitrophenol sensing. Packaging issues for achieving an efficient and cost-effective sensor platform have also been outlined.

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Hand-held Colorimetry Sensor Platform for Determining Salivary α-Amylase Activity and Its Applications for Stress Assessment

Sensors ◽

10.3390/s19071571 ◽

2019 ◽

Vol 19 (7) ◽

pp. 1571 ◽

Cited By ~ 3

Author(s):

Hsien-Yi Hsiao ◽

Richie Chen ◽

Chih-Chi Chou ◽

Tzong-Jih Cheng

Keyword(s):

Assessment Tool ◽

Amylase Activity ◽

Cost Effective ◽

Serum Cortisol ◽

Soluble Starch ◽

Stress Assessment ◽

Sensor Platform ◽

Colored Product ◽

And Performance ◽

Physiological Stressor

This study develops a hand-held stress assessment meter with a chemically colorimetric strip for determining salivary α-amylase activity, using a 3,5 dinitrosalicylic acid (DNS) assay to quantify the reducing sugar released from soluble starch via α-amylase hydrolysis. The colorimetric reaction is produced by heating the strip with a mini polyester heater plate at boiling temperature to form a brick red colored product, which measured at 525 nm wavelength. This investigation describes in detail the design, construction, and performance evaluation of a hand-held α-amylase activity colorimeter with a light emitted diode (LED) and photo-detector with built-in filters. The dimensions and mass of the proposed prototype are only 120 × 60 × 60 mm3 and 200 g, respectively. This prototype has an excellent correlation coefficient (>0.995), comparable with a commercial ultraviolet–visible spectroscope, and has a measurable α-amylase activity range of 0.1–1.0 U mL−1. The hand-held device can measure the salivary α-amylase activity with only 5 μL of saliva within 12 min of testing. This sensor platform effectively demonstrates that the level of salivary α-amylase activity increases more significantly than serum cortisol, the other physiological stressor biomarker, under physiologically stressful exercise conditions. Thus, this work demonstrates that the hand-held α-amylase activity meter is an easy to use and cost-effective stress assessment tool for psychoneuroendocrinology research.

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A cost-effective and open mobile sensor platform for networked surveillance

10.1117/12.895520 ◽

2011 ◽

Cited By ~ 1

Author(s):

Gang Li ◽

Jianhao Du ◽

Chun Zhu ◽

Weihua Sheng

Keyword(s):

Cost Effective ◽

Mobile Sensor ◽

Sensor Platform

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PHOTOPLASTIC MICROCANTILEVER SENSOR PLATFORM FOR EXPLOSIVE DETECTION

International Journal of Nanoscience ◽

10.1142/s0219581x11008861 ◽

2011 ◽

Vol 10 (04n05) ◽

pp. 739-743 ◽

Cited By ~ 4

Author(s):

V. SEENA ◽

AVIL FERNANDES ◽

SOUMYO MUKHERJI ◽

V. RAMGOPAL RAO

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Polymer Composite ◽

Cost Effective ◽

Polymer Composite Materials ◽

Explosive Detection ◽

Electrical Detection ◽

Vapor Detection ◽

Sensor Platform ◽

Electrical Responses

We present an ultrasensitive and cost effective polymeric microcantilever sensor platform for explosive vapor detection. These sensors were fabricated using SU-8 polymer composite materials with two transduction approaches namely (i) optical and (ii) electrical detection. The cantilevers have been characterized for their electrical and mechanical properties. The functionalization of these microcantilevers has been carried out using selective chemicals for most popular explosives such as TNT and RDX. Optical and electrical responses of respective microcantilevers to TNT and RDX vapors are also presented here.

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Design and Development of a New Cost-Effective Internet of Things Sensor Platform for Air Quality Measurements

Journal of Engineering Science and Technology Review ◽

10.25103/jestr.136.12 ◽

2020 ◽

Vol 13 (6) ◽

pp. 81-91

Author(s):

C. Spandonidis ◽

S. Tsantilas ◽

F. Giannopoulos ◽

C. Giordamlis ◽

I. Zyrichidou ◽

...

Keyword(s):

Air Quality ◽

Internet Of Things ◽

Cost Effective ◽

Design And Development ◽

Air Quality Measurements ◽

Sensor Platform ◽

Quality Measurements

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A Cost and Time Effective Alternative for an Aerial Reconnaissance and Surveillance Platform

Volume 1: Advanced Energy Systems, Advanced Materials, Aerospace, Automation and Robotics, Noise Control and Acoustics, and Systems Engineering ◽

10.1115/esda2006-95600 ◽

2006 ◽

Cited By ~ 1

Author(s):

Zenovy S. Wowczuk ◽

Jeffery R. X. Auld ◽

James E. Smith

Keyword(s):

Homeland Security ◽

Cost Effective ◽

Sensor Technology ◽

Stability Field ◽

Sensor Platforms ◽

Design Flexibility ◽

Remote Sensor ◽

Sensor Platform ◽

Platform Development ◽

Platform System

An expanded need for information obtainable from aerial sensor platforms is driving research and development towards both the use of Unmanned Aerial Vehicles (UAV’s) and the extensive physical redesign of existing airframes to accommodate alternative capabilities. This trend in aerial platform development requires significant time and funding and has yet to transpire into low single-system cost that can be rapidly set to use. An alternative concept of utilizing existing and unmodified airframes as sensor platforms, through the use of peripheral systems, presents an attractive solution to this problem. A particular sensor platform system (Oculus) has been designed for use upon a C-130 aircraft and, as a blueprint concept, shows considerable design flexibility for use upon additional existing military and commercial airframes. This roll-on roll-off sensor platform is a stand alone system that requires no modification to the C-130 airframe and has the capacity to incorporate multi-mission sensor capabilities which can be used for a wide variety of missions. These missions are (but not limited to) Environmental Impact Assessment, Counter Drug, Counter Terrorism, Homeland Security, Resource Surveys, Environmental Surveys, and Search and Rescue. This system (patent pending) has been developed to support a broad spectrum of the latest in remote sensor technology for missions requiring highly proficient reconnaissance capabilities. It was also designed under the criterion of mission flexibility, stability, field of view, storability, modular attachment space and provisions for expansion and upgrade. This sensor platform system provides a superior cost-effective upgrade capability to existing airframes.

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Greenly synthesized graphene with l-glutathione-modified electrode and its application towards determination of rutin

RSC Advances ◽

10.1039/c6ra13457b ◽

2016 ◽

Vol 6 (96) ◽

pp. 94024-94032 ◽

Cited By ~ 10

Author(s):

Yudong Gao ◽

Lu Wang ◽

Yulong Zhang ◽

Shuo Li ◽

Lina Zou ◽

...

Keyword(s):

Modified Electrode ◽

Environmentally Friendly ◽

Cost Effective ◽

Water Soluble ◽

Voltammetric Sensor ◽

Cost Effective Approach ◽

Sensor Platform

A simple, environmentally friendly and cost-effective approach for preparation of water-soluble functional graphene was proposed for constructing a voltammetric sensor platform.

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Packaging Issues and Solutions for Ultra-Low Power, High Efficiency GaN micro-LEDs for a Battery Free, Sub-mm2, Tetherless, Smart IoT System

International Symposium on Microelectronics ◽

10.4071/2380-4505-2020.1.000181 ◽

2020 ◽

Vol 2020 (1) ◽

pp. 000181-000184

Author(s):

F.R. Libsch ◽

S.W. Bedell ◽

B.C. Webb ◽

A. Paidimarri

Keyword(s):

Low Power ◽

Flip Chip ◽

High Efficiency ◽

Low Voltage ◽

Cost Effective ◽

Back Side ◽

Ultra Low Power ◽

Emission Area ◽

Sensor Platform ◽

Side Emission

Abstract This paper discusses some design and implementation issues related to GaN micro-LED (μLED) incorporated into the heterogeneous packaging of IBM’s smart and secure sensor platform. For cost effective μLEDs, the sapphire substrate needs to be singulated reliably and with minimum kerf perimeter, be ultra-clean and smooth to allow back side emission without scattering, and high yielding front side flip chip bonding with 20μm C4s on 40μm pitch. The GaN μLEDs are design for low voltage/low power operation with an emission area of 20μm × 20μm with critical current density of ~10nA/μm2. Power and downlink data is delivered to the system via optical energy harvesting by on-silicon carrier photovoltaics and communication photodiode, respectively. Optical amplitude modulated uplink communication by heterogeneous packaging of the GaN μLED with a 14nm CMOS smart chip will be detailed and demonstrated in presentation.

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Towards A Graphene Chip System For Blood Clotting Disease Diagnostics

10.23889/suthesis.59099 ◽

2020 ◽

Author(s):

◽

Jacob J. Mitchell

Keyword(s):

Real Time ◽

Blood Clotting ◽

Point Of Care ◽

Cost Effective ◽

Sampling Point ◽

Sensor Platform ◽

Disease Diagnostics ◽

Highly Sensitive ◽

Wide Range ◽

Semiconductor Fabrication

Point of care diagnostics (POCD) allows the rapid, accurate measurement of analytes near to a patient. This enables faster clinical decision making and can lead to earlier diagnosis and better patient monitoring and treatment. However, despite many prospective POCD devices being developed for a wide range of diseases this promised technology is yet to be translated to a clinical setting due to the lack of a cost-eﬀective biosensing platform.This thesis focuses on the development of a highly sensitive, low cost and scalable biosensor platform that combines graphene with semiconductor fabrication tech-niques to create graphene ﬁeld-eﬀect transistors biosensor. The key challenges of designing and fabricating a graphene-based biosensor are addressed. This work fo-cuses on a speciﬁc platform for blood clotting disease diagnostics, but the platform has the capability of being applied to any disease with a detectable biomarker.Multiple sensor designs were tested during this work that maximised sensor ef-ﬁciency and costs for diﬀerent applications. The multiplex design enabled diﬀerent graphene channels on the same chip to be functionalised with unique chemistry. The Inverted MOSFET design was created, which allows for back gated measurements to be performed whilst keeping the graphene channel open for functionalisation. The Shared Source and Matrix design maximises the total number of sensing channels per chip, resulting in the most cost-eﬀective fabrication approach for a graphene-based sensor (decreasing cost per channel from £9.72 to £4.11).The challenge of integrating graphene into a semiconductor fabrication process is also addressed through the development of a novel vacuum transfer method-ology that allows photoresist free transfer. The two main fabrication processes; graphene supplied on the wafer “Pre-Transfer” and graphene transferred after met-allisation “Post-Transfer” were compared in terms of graphene channel resistance and graphene end quality (defect density and photoresist). The Post-Transfer pro-cess higher quality (less damage, residue and doping, conﬁrmed by Raman spec-troscopy).Following sensor fabrication, the next stages of creating a sensor platform involve the passivation and packaging of the sensor chip. Diﬀerent approaches using dielec-tric deposition approaches are compared for passivation. Molecular Vapour Deposi-tion (MVD) deposited Al2O3 was shown to produce graphene channels with lower damage than unprocessed graphene, and also improves graphene doping bringing the Dirac point of the graphene close to 0 V. The packaging integration of microﬂuidics is investigated comparing traditional soft lithography approaches and the new 3D printed microﬂuidic approach. Speciﬁc microﬂuidic packaging for blood separation towards a blood sampling point of care sensor is examined to identify the laminar approach for lower blood cell count, as a method of pre-processing the blood sample before sensing.To test the sensitivity of the Post-Transfer MVD passivated graphene sensor de-veloped in this work, real-time IV measurements were performed to identify throm-bin protein binding in real-time on the graphene surface. The sensor was function-alised using a thrombin speciﬁc aptamer solution and real-time IV measurements were performed on the functionalised graphene sensor with a range of biologically relevant protein concentrations. The resulting sensitivity of the graphene sensor was in the 1-100 pg/ml concentration range, producing a resistance change of 0.2% per pg/ml. Speciﬁcity was conﬁrmed using a non-thrombin speciﬁc aptamer as the neg-ative control. These results indicate that the graphene sensor platform developed in this thesis has the potential as a highly sensitive POCD. The processes developed here can be used to develop graphene sensors for multiple biomarkers in the future.

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