J
John B. Pethica
Researcher at Trinity College, Dublin
Publications - 132
Citations - 4584
John B. Pethica is an academic researcher from Trinity College, Dublin. The author has contributed to research in topics: Scanning tunneling microscope & Conductive atomic force microscopy. The author has an hindex of 37, co-authored 131 publications receiving 4445 citations. Previous affiliations of John B. Pethica include University of Cambridge & Queen Elizabeth College, Mauritius.
Papers
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Journal ArticleDOI
Tip Surface Interactions in STM and AFM
John B. Pethica,Warren C. Oliver +1 more
TL;DR: In this paper, the interaction between tip and flat surface in the STM and AFM is reviewed and a new, AC method to determine the absolute value of area of contact and interaction is presented.
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Nanoindentation creep of single-crystal tungsten and gallium arsenide
S. A. Syed Asif,John B. Pethica +1 more
TL;DR: In this article, an extensive study of indentation creep on the nanometre scale has been made on single-crystal indium, tungsten and gallium arsenide.
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On the stability of a tip and flat at very small separations
John B. Pethica,Adrian P. Sutton +1 more
TL;DR: In this article, it was shown that at sufficiently small separations, ∼1−2 A, the tip and flat surfaces in the scanning tunneling microscope or atomic force microscope (AFM) will jump together, irrespective of apparatus construction.
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Mechanical Properties of Nanometre Volumes of Material: use of the Elastic Response of Small Area Indentations
John B. Pethica,Warren C. Oliver +1 more
TL;DR: In this paper, a method for determining the stiffness of a sub-micron indentation contact area is presented, which allows measurement of elastic modulus as well as plastic hardness, continuously during a single indentation, and without the need for discrete unloading cycles.
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Adhesion and micromechanical properties of metal surfaces
TL;DR: In this article, a fine pointed stylus of tungsten and a single crystal of a softer metal (nickel) was used to measure the friction and adhesion of a model microasperity.