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Search Publications by: Kurt D Benkstein (Fed)

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Displaying 1 - 25 of 37

Operando photoelectron spectromicroscopy of nanodevices: Correlating the surface chemistry and transport in SnO2 nanowire chemiresistors

June 29, 2023
Andrei Kolmakov, Trey Diulus, Kurt D. Benkstein, Stephen Semancik, Majid Kazemian, Matteo Amati, Maya Kiskinova, Luca Gregoratti
With size reduction of active elements in microelectronics to tens of nanometers and below, the effect of surface and interface properties on overall device performance becomes crucial. High resolution spectroscopic and imaging techniques provide a

Deep Learning Image Analysis of Nanoplasmonic Sensors: Toward Medical Breath Monitoring

November 23, 2022
Yangyang Zhao, Boqun Dong, Kurt D. Benkstein, Lei Chen, Kristen L. Steffens, Stephen Semancik
Sensing biomarkers in exhaled breath offers a potentially portable, cost-effective, and noninvasive strategy for disease diagnosis screening and monitoring, while high sensitivity, wide sensing range, and target specificity are critical challenges. We

Size and Number Concentration Measurements of Polystyrene Nanoparticle Suspensions using Several Different Techniques

September 8, 2022
Paul C. DeRose, Kurt D. Benkstein, Elzafir B. Elsheikh, Adolfas K. Gaigalas, Sean Lehman, Dean C. Ripple, Linhua Tian, Wyatt N. Vreeland, Adam York, Yu-Zhong Zhang, Lili Wang
The number concentrations of nominal 100 nm, 200 nm and 500 nm diameter, fluorescently-labeled polystyrene nanosphere suspensions were measured using seven different techniques. Diameter values were also measured where possible. The diameter values were

Plasmonic Sensing Studies of a Gas-Phase Cystic Fibrosis Marker in Moisture Laden Air

May 29, 2021
Libin Sun, Drew Hall, Douglas Conrad, Kurt D. Benkstein, Stephen Semancik, Mona Zaghloul
A plasmonic sensing platform was developed as a noninvasive method to monitor gas-phase biomarkers related to cystic fibrosis (CF). The nanohole array (NHA) sensing platform is based on localized surface plasmon resonance (LSPR) and offers a rapid data

Establishing Standards and Methods for Qualification and Validation of New Particle Measurement Technologies

November 12, 2019
Srivalli Telikepalli, Dean C. Ripple, Kurt D. Benkstein, Kristen L. Steffens, Michael J. Carrier, Christopher B. Montgomery
Numerous particle sizing and counting methods exist for measuring particles in the submicrometer, subvisible, and visible size range. This article will briefly describe some key aspects that need to be considered for the most commonly used methods in order

Miniaturized Nanohole Array Based Plasmonic Sensor for the Detection of Acetone and Ethanol with Insights into the Kinetics of Adsorptive Plasmonic Sensing

June 6, 2019
Yangyang Zhao, Kalisadhan Mukherjee, Kurt D. Benkstein, Libin Sun, Kristen L. Steffens, Christopher B. Montgomery, Stephen Semancik, Mona Zaghloul
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

Metal Organic Framework-Coated Optical VOC Gas Sensor

November 8, 2018
Yangyang Zhao, Mona E. Zaghloul, Yigal Lilach, Kurt D. Benkstein, Stephen Semancik
We report a metal organic framework (MOF)-coated nanohole array based plasmonic gas sensor. Arrays of 200 nm circular holes are fabricated with a period of 400 nm. 10 nm thick MOF is coated on the sensor platform to provide high sensitivity and real-time

The I/O transform of a chemical sensor

March 14, 2016
Nalin Katta, Douglas C. Meier, Kurt D. Benkstein, Stephen Semancik, Baranidharan Raman
A number of sensing technologies using a variety of transduction principles have been proposed for the purpose of non-invasive chemical sensing. A fundamental problem common to all sensing technologies is determining what features of the transducer's

Gas Sensing with Bare and Graphene-covered Optical Nano Antenna Structures

February 17, 2016
Bhaven Mehta, Kurt D. Benkstein, Stephen Semancik, Mona E. Zaghloul
The motivation behind this work is to study the gas phase chemical sensing characteristics of optical (plasmonic) nano antennas (ONA) and graphene/graphene oxide-covered versions of these structures. ONA are devices that have their resonating frequency in

A Demonstration of Fast and Accurate Discrimination and Quantification of Chemically Similar Species Utilizing a Single Cross-Selective Chemiresistor

June 14, 2014
Alexander (. Vergara Tinoco, Kurt D. Benkstein, Christopher B. Montgomery, Stephen Semancik
Performance characteristics of gas-phase microsensors will determine the ultimate utility of these devices for a wide range of chemical monitoring applications. Considerable effort has led to electronic nose devices that utilize multiple cross-selective

Microsensors for Mars: Trace Analyte Detection in a Simulated Martian Environment

May 23, 2014
Kurt D. Benkstein, Phillip H. Rogers, Christopher B. Montgomery, C. Jin, Baranidharan Raman, Stephen Semancik
Chemiresistive microsensor arrays are being developed and tested in a simulated Martian environment. Target analyte species include trace small molecules that may indicate current geological or, potentially, biological activity on Mars. The sensing films

Nanomaterials-Enabled Photonic and Chemiresistive Sensing of Chemicals and Biochemicals

May 12, 2014
Charles J. Choi, Kurt D. Benkstein, Phillip H. Rogers, Christopher B. Montgomery, Stephen Semancik
Contact events occurring between target species and surface sites on sensing materials initiate front-end interactions and subsequent transduction processes that can yield viable signals for target detection. By offering high surface-to-volume ratios, and

Analytical Capabilities of Chemiresistive Microsensor Arrays in a Simulated Martian Atmosphere

March 6, 2014
Kurt D. Benkstein, Phillip H. Rogers, Christopher B. Montgomery, Jerry Jin, Baranidharan Raman, Stephen Semancik
The capabilities of a chemiresistive microsensor array for detecting and identifying four trace target analytes were examined under a simulated Martian atmosphere. The simulated environment included low oxygen content (0.15 %) balanced by carbon dioxide

Microsensor Analyses for Trace Targets over Extended Times in a Simulated Martian Environment

November 6, 2013
Kurt D. Benkstein, Phillip H. Rogers, Christopher B. Montgomery, Stephen Semancik, C. Jin, Baranidharan Raman
We have studied the performance of a chemical microsensor array in a simulated Martian environment, which involved a carbon dioxide-rich background with low oxygen content (0.15 %) at low pressure and temperature to mimic the conditions at the Martian

Methods for Optimizing and Extending the Performance of Chemiresistive Gas Microsensors

November 3, 2013
Kurt D. Benkstein, Alexander (. Vergara Tinoco, Christopher B. Montgomery, Baranidharan Raman, Stephen Semancik
This paper briefly describes varied concepts developed and implemented to enhance the performance of gas-phase chemical microsensors. The developments are illustrated for chemiresistive (MEMS) microdevices, and involve efficient, array-based approaches to