Katie D. Cadwell | Researchain

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Featured researches published by Katie D. Cadwell.

ieee sensors | 2007

A Liquid Crystal Based Gas Sensor Using Microfabricated Pillar Arrays as a Support Structure

Sudheer S. Sridharamurthy; Katie D. Cadwell; Nicholas L. Abbott; Hongrui Jiang

We present principles for the design of a vapor-phase chemical sensor based on orientational transitions of nematic liquid crystals (LC) supported by a microfabricated pillar array structure. These principles are demonstrated by using the structure to detect vapor-phase Di-methyl methyl phosphonate (DMMP) via change in the intensity of light transmitted through the LC (5CB: 4-pentyl-4-cyanobiphenyl). The micro-pillar support structure stabilizes a thin (-22 mum) LC film by capillary force. The structure offers easier filling of LC, reduced susceptibility to gravity and shock, and is capable of embedding different thicknesses of LC films. Concentrations down to 10 ppm of DMMP were detected.

Nano Letters | 2006

Tailoring the interfaces between nematic liquid crystal emulsions and aqueous phases via layer-by-layer assembly.

Elvira Tjipto; Katie D. Cadwell; John F. Quinn; Angus P. R. Johnston; Nicholas L. Abbott; Frank Caruso

Sensors and Actuators B-chemical | 2007

Detection of organophosphorous nerve agents using liquid crystals supported on chemically functionalized surfaces

Katie D. Cadwell; Nathan A. Lockwood; Barbara A. Nellis; Mahriah E. Alf; Colin R. Willis; Nicholas L. Abbott

Sensors and Actuators B-chemical | 2005

Use of self-assembled monolayers, metal ions and smectic liquid crystals to detect organophosphonates

Kun-Lin Yang; Katie D. Cadwell; Nicholas L. Abbott

Smart Materials and Structures | 2008

A microstructure for the detection of vapor-phase analytes based on orientational transitions of liquid crystals

Sudheer S. Sridharamurthy; Katie D. Cadwell; Nicholas L. Abbott; Hongrui Jiang

Journal of Physical Chemistry B | 2006

Infrared Spectroscopy of Competitive Interactions between Liquid Crystals, Metal Salts, and Dimethyl Methylphosphonate at Surfaces

Katie D. Cadwell; Mahriah E. Alf; Nicholas L. Abbott

Surface Science | 2004

Deciphering the interactions between liquid crystals and chemically functionalized surfaces: Role of hydrogen bonding on orientations of liquid crystals

Yan Yeung Luk; Kun Ling Yang; Katie D. Cadwell; Nicholas L. Abbott

Advanced Materials | 2006

Formation of Polyelectrolyte Multilayer Films at Interfaces Between Thermotropic Liquid Crystals and Aqueous Phases

Nathan A. Lockwood; Katie D. Cadwell; Frank Caruso; Nicholas L. Abbott

Journal of Chemical Education | 2010

Art as an Avenue to Science Literacy: Teaching Nanotechnology through Stained Glass

Kimberly A. Duncan; Christopher J. Johnson; Kyle M. McElhinny; Steve Ng; Katie D. Cadwell; Greta M. Zenner Petersen; Angela Johnson; Dana Horoszewski; Kenneth L. Gentry; George C. Lisensky; Wendy C. Crone

Chemistry of Materials | 2007