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Author: jon geist

Displaying records 11 to 20 of 82 records.
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11. Quantitative Measurements of the Size Scaling of Linear and Circular DNA in Nanofluidic Slitlike Confinement
Published: 2/14/2012
Authors: Elizabeth A Strychalski, Jon C Geist, Michael Gaitan, Laurie E Locascio, Samuel M Stavis
Abstract: Quantitative size measurements of single linear and circular DNA molecules in nanofluidic slitlike confinement are reported. A novel experimental method using DNA entropophoresis down a nanofluidic staircase implemented comprehensive variation of sl ...

12. DNA Molecules Descending a Nanofluidic Staircase by Entropophoresis
Published: 1/26/2012
Authors: Samuel M Stavis, Jon C Geist, Michael Gaitan, Laurie E Locascio, Elizabeth A Strychalski
Abstract: A complex entropy gradient for confined DNA molecules was engineered for the first time. Following the second law of thermodynamics, this enabled the directed self-transport and self-concentration of DNA molecules. This new nanofluidic method is term ...

Published: 1/3/2012
Authors: Muhammad Yaqub Afridi, Christopher B Montgomery, Stephen Semancik, Kenneth Gruber Kreider, Jon C Geist
Abstract: In this paper we describe a novel long-term microhotplate temperature sensor calibration technique suitable for Built-In Self Test (BIST). The microhotplate thermal resistance (thermal efficiency) and the thermal voltage from an integrated platinum-r ...

Published: 10/3/2011
Authors: Samuel M Stavis, Jon C Geist, Michael Gaitan, Laurie E Locascio, Elizabeth A Strychalski
Abstract: Entropophoresis ‹ motion caused by an entropy gradient ‹ is a novel nanofluidic method to direct the self-transport of biopolymers that established a new paradigm of nanofluidic functionality with broad relevance to lab-on-a-chip technol-ogy. He ...

15. Rectangular Scale-Similar Etch Pits in Monocrystalline Diamond
Published: 9/15/2011
Authors: Craig Dyer McGray, Richard A Allen, Marc J Cangemi, Jon C Geist
Abstract: Etching of monocrystalline diamond in oxygen and water vapor at 1100° C through small pores in a silicon nitride film produced smooth-walled rectangular cavities. The cavities were imaged by electron microscope and measured by interferometric microsc ...

16. User's Guide for SRM 2494 and 2495: The MEMS 5-in-1, 2011 Edition
Series: Special Publication (NIST SP)
Report Number: 260-179
Published: 9/6/2011
Authors: Janet M Cassard, Jon C Geist, Theodore Vincent Vorburger, David Thomas Read, David G Seiler
Abstract: The Microelectromechanical Systems (MEMS) 5-in-1 is a standard reference device sold as a NIST Standard Reference Material (SRM) that contains MEMS test structures on a test chip. The two SRM chips (2494 and 2495) provide for both dimensional an ...

17. Traceable Calibration of a Critical Dimension Atomic Force Microscope
Published: 6/6/2011
Authors: Ronald G Dixson, Ndubuisi George Orji, Craig Dyer McGray, Jon C Geist
Abstract: The National Institute of Standards and Technology (NIST) has a multifaceted program in atomic force microscope (AFM) dimensional metrology. One component of this effort is a custom in-house metrology AFM, called the calibrated AFM (C-AFM). The NI ...

18. Progress on CD-AFM tip width calibration standards
Published: 5/10/2011
Authors: Ronald G Dixson, Boon Ping Ng, Craig Dyer McGray, Ndubuisi George Orji, Jon C Geist
Abstract: The National Institute of Standards and Technology (NIST) is developing a new generation of standards for calibration of CD-AFM tip width. These standards, known as single crystal critical dimension reference materials (SCCDRM) have features with ne ...

19. Entropophoresis of Single Biomolecules Down a Nanofluidic Staircase
Published: 1/11/2011
Authors: Samuel M Stavis, Elizabeth A Strychalski, Jon C Geist, Michael Gaitan, Laurie E Locascio

20. MEMS Microhotplate Temperature Sensor BIST: Importance and Applications
Published: 11/3/2010
Authors: Muhammad Yaqub Afridi, Jon C Geist
Abstract: This paper describe the importance of temperature sensor built-in self test (BIST) for microhotplate based sensors. It shows possible ways to implement BIST functionality for microhotplate temperature sensor, including Resistance Temperature Detector ...

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