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NIST Authors in Bold

Displaying 1051 - 1075 of 1856

NBTI: Confusion, Frustration, and Promise?

May 2, 2010
Author(s)
Jason P. Campbell
The negative-bias temperature instability (NBTI) is a reliability problem that, in the last ten years, has risen from relative obscurity to become the most important reliability problem in advanced pMOSFET devices. Even though a significant effort has been

Reactive MALDI Mass Spectrometry of Saturated Hydrocarbons: A Theoretical Study

May 1, 2010
Author(s)
William E. Wallace, Lewandowski Hans, Meier J. Robert
Recently it has been shown that the cobaltocenium cation, prepared by the laser ablation of a CoCp(CO)2/fullerene matrix, may react with alkanes and polyethylenes in the gas phase via a dehydrogenation reaction to produce [Co(Cp)2(alkadiene)]+ ions without

Tissue Engineered Scaffolds for Screening Nanoparticle - Cell Interactions

April 21, 2010
Author(s)
Kavita M. Jeerage, Elisabeth Mansfield, Tammy L. Oreskovic, Nikki S. Rentz, Timothy P. Quinn
Long-term studies of nanoparticle-cell interactions require an advanced tissue-like environment in which nanoparticles are encapsulated with a population of cells for real-time and end-point analysis. By using soft tissue-mimicking hydrogels, the cells are

Architectural Effects on Reaction-Diffusion Kinetics in Molecular Glass Photoresists

April 20, 2010
Author(s)
Vivek M. Prabhu, Shuhui Kang, Christopher L. Soles, Christopher K. Ober, Jing Sha, Jin-Kyun Lee, Peter V. Bonnesen
Understanding acid reaction-diffusion kinetics is crucial for controlling the lithographic performance of chemically amplified photoresists. In this work, we study how the molecular architectures of positive-tone chemically amplified molecular glass

Assessing and Improving Bonding in Wet Conditions

April 3, 2010
Author(s)
Kar T. Tan, Christopher C. White, Donald L. Hunston, Vogt D. Bryan, Anthony Haag
Water is ubiquitous in any uncontrolled setting and affects world wide commerce by instigating device and structural failures. This can be a result of corrosion, electrical shorting, or adhesive failure. For adhesive failure, the environmental attack of

POSS modified cellulose for improving flammability characteristics of polystyrene

April 2, 2010
Author(s)
Douglas M. Fox, Mauro Zammarano, Jeffrey W. Gilman, Jieun Lee, Eric Balsley, Erica Ford
Due to its strength, charring ability, and biodegradability, cellulose-based reinforced polymers have received considerable attention. However, its high polarity, large molecular size, and solvent resistivity, have often resulted in immiscible or

Adhesion research at the National Institute of Standards and Technology (NIST)

April 1, 2010
Author(s)
Christopher M. Stafford, Adam J. Nolte, Gale A. Holmes, Sheng Lin-Gibson, John A. Howarter
NIST s involvement in adhesion research has been wide ranging and is ultimately in response to interactions between individual project leaders and our industrial partners. In this way, NIST s participation in the Adhesion Society has been instrumental in

Excimer laser-based purification of single-walled carbon nanotubes

April 1, 2010
Author(s)
Katie Hurst, Elisabeth Mansfield, Anne Dillon, John H. Lehman
Bulk purified carbon nanotube (CNT) material is essential for the realization of CNT applications including incorporating them into various composite materials. We have developed a laser-based purification technique for bulk single-walled carbon nanotubes

Novel Dimethacrylates with Quaternary Ammonium Functionalities for Reduced Bacteria Adhesion

April 1, 2010
Author(s)
Nancy J. Lin, Joseph M. Antonucci, Diana N. Zeiger, Kathy Tang, Bruce O. Fowler, Sheng Lin-Gibson
Biofilm growth and secondary caries have resulted in the failure of many dental composite restorations. One approach to address this issue is the modification of dental materials to reduce bacterial adhesion and biofilm growth. Quaternary ammonium salts

Wrinkling and Strain Softening in Single-Wall Carbon Nanotube Membranes

March 26, 2010
Author(s)
Erik K. Hobbie, Daneesh O. Simien, Jeffrey A. Fagan, JiYeon Huh, Jun Y. Chung, Steven D. Hudson, Jan Obrzut, Jack F. Douglas, Christopher M. Stafford
Ultrathin layers of single-wall carbon nanotubes (SWCNTs) show considerable promise for applications ranging from fuel-cell membranes and biochemical sensors to bioactive films and transparent electrodes. The high conductivity and extreme anisotropy of

Methods for TEM analysis of NIST’s SWCNT SRM

March 25, 2010
Author(s)
Roy H. Geiss, Elisabeth Mansfield, Jeffrey A. Fagan
The National Institute of Standards and Technology (NIST) is developing a series of single-walled carbon nanotube, SWCNT, reference materials, RMs, to provide researchers with well characterized materials for their applications. The SWCNT reference

Compressive stress effect on the radial elastic modulus of oxidized Si nanowires

March 23, 2010
Author(s)
Gheorghe Stan, Sergiy Krylyuk, Albert Davydov, Robert F. Cook
Detailed understanding and optimal control of the properties of Si nanowires are essential steps in developing Si nanoscale circuitry. In this work, we have investigated mechanical properties of as-grown and oxidized Si nanowires as a function of their

Harnessing Wrinkle Delamination Mechanics to Measure and Pattern Polymer Coatings

March 21, 2010
Author(s)
Adam J. Nolte, Jun Y. Chung, Christopher Stafford
Compressive stresses in stiff polymer coatings can give rise to surface instabilities in which the coating adopts a sinusoidally wrinkled morphology with a dominant wavelength, d, as displayed in Figure 1a. Such instabilities are generally observed for

Influence of molecular mass on the modulus of thin polystyrene films

March 21, 2010
Author(s)
Jessica M. Torres, Christopher Stafford, Bryan D. Vogt
In this work, we examine the influence of relative molecular mass (Mn, or the number average molecular mass) of PS on the thickness-dependent moduli using a wrinkling based instability of a stiff film on an elastic substrate. This wrinkling based metrology

Characterization of Soluble Anthradithiophene Derivatives

March 18, 2010
Author(s)
Brad Conrad, Calvin Chan, Marsha A. Loth, John E. Anthony, David J. Gundlach
We will discuss the growth and electrical measurements of a newly developed, partially fluorinated anthradithiophene (F-ADT) derivative with tert-butyldiphenylsilyl (TBDMS) side groups. Single crystals of the material can be readily grown and device hole
Displaying 1051 - 1075 of 1856