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Topic Area: Surface Physics

Displaying records 1 to 10 of 131 records.
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1. Nanoscale interfacial friction and adhesion on supported versus suspended monolayer and multilayer graphene
Topic: Surface Physics
Published: 1/8/2013
Authors: Zhao Z. Deng, Nikolai Nikolayevich Klimov, Santiago Solares, Teng Li, Hua Xu, Rachel J Cannara
Abstract: Using atomic force microscopy (AFM), we study the adhesive, frictional and elastic properties of supported and suspended graphene exfoliated onto pit-patterned silicon dioxide-on-silicon (SiO2/Si) substrates. In spite of the greater adhesive force b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911777

2. Adhesion-dependent negative friction coefficient on chemically modified graphite at the nanoscale
Topic: Surface Physics
Published: 10/14/2012
Authors: Zhao Z. Deng, Alexander Y. Smolyanitsky, Qunyang Li, Xi-Qiao Feng, Rachel J Cannara
Abstract: A negative friction coefficient is observed for graphite using atomic force microscopy. The magnitude of the friction coefficient increases with adhesion, which we control by exposing graphite to different conditions. We demonstrate that the negative ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908424

3. Toward a Probe-Based Method for Determining Exfoliation Energies of Lamellar Materials
Topic: Surface Physics
Published: 10/4/2012
Authors: Zhao Z. Deng, Alexander Y. Smolyanitsky, Qunyang Li, Xi-Qiao Feng, Rachel J Cannara
Abstract: We discuss a potential new measurement application based on nanotribological measurements and simulations of the model lamellar material graphite. While frictional forces always oppose motion, we have observed that friction increases with decreasing ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912661

4. Real-time measurements of plasma photoresist modifications: The role of plasma vacuum ultraviolet radiation and ions
Topic: Surface Physics
Published: 5/23/2012
Authors: Weilnboeck Florian, Nirav Kumar, Gottlieb Oehrlein, Ting-Ying Chung, D Graves, Mingqi Li, Eric A. Hudson, Eric C Benck
Abstract: Plasma-induced roughness development of photoresist (PR) can be due to synergistic interactions of surface modifications introduced by ions, bulk material modifications by ultraviolet (UV)/vacuum ultraviolet (VUV) radiation, and increased temperature ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910071

5. Effect of elastic deformation on frictional properties of few-layer graphene
Topic: Surface Physics
Published: 1/9/2012
Authors: Alexander Y. Smolyanitsky, Jason Philip Killgore, Vinod K Tewary
Abstract: We describe the results of Brownian dynamics (BD) simulations of an AFM tip scanned on locally suspended few-layer graphene. The effects of surface compliance and sample relaxation are directly related to the observed friction force. We demonstrate t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909404

6. Nanoscale Friction: Measurement and Analysis
Topic: Surface Physics
Published: 10/19/2011
Author: Rachel J Cannara
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906880

7. Controlling Formation of Atomic Step Morphology on Micro-patterned Si (100)
Topic: Surface Physics
Published: 8/9/2011
Authors: Kai Li, Pradeep Narayanan Namboodiri, Sumanth B. Chikkamaranahalli, Gheorghe Stan, Ravikiran Attota, Joseph Fu, Richard M Silver
Abstract: Micro scale features are fabricated on Si (100) surfaces using lithographic techniques and then thermally processed in an ultra high vacuum (UHV) environment. Samples are flash heated at 1200 °C and further annealed at 1050 °C for 18 hours. The surf ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907301

8. HIGHLY CHARGED ION INTERACTIONS WITH THIN INSULATING FILMS
Topic: Surface Physics
Published: 6/1/2011
Authors: Joshua M Pomeroy, Russell Lake, C E Sosolik
Abstract: The electrical conductance of magnetic tunnel junction (MTJ) devices whose ultra-thin aluminum oxide tunnel barrier was irradiated by highly charged ions (HCIs) increases linearly with the fluence of HCIs, while retaining a current-voltage relationsh ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906982

9. Atomistic Factors Governing Adhesion between Diamond, Amorphous Carbon, and Model Diamond Nanocomposite Surfaces
Topic: Surface Physics
Published: 10/1/2010
Authors: Pamela L Piotrowski, Rachel J Cannara, Guangtu Gao, Joseph J Urban, Robert W Carpick, Judith A Harrison
Abstract: Complementary atomic force microscopy (AFM) and molecular dynamics (MD) simulations were conducted to determine the work of adhesion for diamond(111)(1x1) and diamond(001)(2x1) surfaces paired with other carbon-based materials. In the AFM experiments ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903076

10. Modifying electron transfer at the silicon-molecule interface using atomic tethers
Topic: Surface Physics
Published: 8/10/2010
Author: Christina Ann Hacker
Abstract: We present the correlation of the electronic properties at the semiconductor-molecule interface with the nature of the covalent attachment. The chemical state, monolayer structure, and electronic properties of aliphatic monolayers with Si-O, Si-C, a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904819