Browsing by Author "Spaepen, Frans"
Now showing items 1-18 of 18
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A catalogue of [100], [110], and [111] symmetric tilt boundaries in face-centered cubic hard sphere crystals.
Frost, H.J.; Ashby, M.F.; Spaepen, Frans A. (Harvard Division of Applied Sciences, 1982) -
Chemical Potentials Driving Diffusional Flow in Multilayers
Spaepen, Frans A. (Trans Tech Publications, 1994)The capillary part of the chemical potential is calculated for three cases: a single anisotropic grain, a thin film with columnar grains, and a polycrystalline textured binary multilayer. A proposal is made for partioning ... -
Comment on “Low-temperature homoepitaxial growth on high-miscut Si(111) mediated by thin overlayers of Pb” [Appl. Phys. Lett. 75, 2954 (1999)]
Evans, P. G.; Dubon, O. D.; Chervinsky, J; Spaepen, Frans A.; Golovchenko, Jene Andrew (AIP Publishing, 2000) -
Crystal-Liquid Transitions Studied With Colloids in an Electric Bottle
Hwang, Hyerim (2016-05-18)In this thesis, we have presented the experimental investigations on the crystal-liquid transitions in a colloidal system. Colloids behave as big atoms, thus they are good model systems to study the dynamics of condensed ... -
Defects in Hard-Sphere Colloidal Crystals
Persson Gulda, Maria Christina Margareta (2013-03-15)Colloidal crystals of \(1.55 \mu m\) diameter silica particles were grown on {100} and flat templates by sedimentation and centrifugation. The particles interact as hard spheres. The vacancies and divacancies in these ... -
Doping by Metal-Mediated Epitaxy: Growth of As Delta-Doped Si through a Pb Monolayer
Dubon, Oscar D.; Evans, Paul G.; Chervinsky, John F.; Aziz, Michael; Spaepen, Frans; Golovchenko, Jene; Chisholm, Matthew F.; Muller, David A. (American Institute of Physics, 2001)In molecular-beam epitaxy a monolayer of Pb on the Si(111) surface induces single-crystal growth at temperatures well below those required for similar growth on a bare surface. We demonstrate that the suppression of dopant ... -
Experimental Observation of the Crystallization of Hard-Sphere Colloidal Particles by Sedimentation onto Flat and Patterned Surfaces
Ramsteiner, I.B.; Jensen, Katharine Estelle; Weitz, David A.; Spaepen, Frans A. (American Physical Society, 2009)We present a confocal microscopy study of 1.55micrometers monodisperse silica hard spheres as they sediment and crystallize at the bottom wall of a container. If the particles sediment onto a featureless flat wall, the two ... -
Grain Growth in Thin Films with a Fibre Texture Studied by Phase-Field Simulations and Mean Field Modelling
Moelans, N.; Spaepen, Frans A.; Wollants, P. (Taylor & Francis, 2010)The evolution of fiber textured structures is simulated in 2 dimensions using a generalized phase field model assuming two forms for the misorientation, a steady-state regime is reached after a finite amount of grain growth, ... -
Liquid-metal-mediated homoepitaxial film growth of Ge at low temperature
Xiong, Fulin; Ganz, Eric; Loeser, A. G.; Golovchenko, Jene Andrew; Spaepen, Frans A. (AIP Publishing, 1991)We demonstrate liquid‐metal‐mediatedhomoepitaxialcrystal growth of Ge on Ge(111) at temperatures in the range of 400–450 °C. Crystal growth proceeds by diffusion of Ge through a liquid layer, followed by precipitation onto ... -
Local shear transformations in deformed and quiescent hard-sphere colloidal glasses
Jensen, Karen; Weitz, David A.; Spaepen, Frans A. (American Physical Society (APS), 2014)We performed a series of deformation experiments on a monodisperse, hard-sphere colloidal glass while simultaneously following the 3D trajectories of roughly 50,000 individual particles with a confocal microscope. In each ... -
Low-temperature homoepitaxial growth on Si(111) mediated by thin overlayers of Au
Wilk, G. D.; Martinez, R; Chervinsky, John; Spaepen, Frans A.; Golovchenko, Jene Andrew (AIP Publishing, 1994)High quality homoepitaxialgrowth of Si on Si(111) through an overlayer of Au is shown to occur at 450–500 °C, far below the temperature required for growth of Si of similar quality on bare Si(111). Films of unlimited ... -
Nanocalorimetry Experiments and First-Principles Theoretical Studies of Solid-State Reactions in Nanolaminates
Lee, Dongwoo (2016-05-04)The extraordinary sensitivity and extremely small thermal mass of chip-based nanocalorimetry sensors allow the study of reactions in thin films over a broad range of heating rates, from isothermal to 10^5 K/s. First-principles ... -
Partitionless crystallization and glass formation in Fe-B alloys during picosecond pulsed laser quenching
Spaepen, Frans A.; Lin, Chien-Jung (1984) -
A second report on tilt boundaries in hard sphere F.C.C. crystals
Frost, Harold J.; Spaepen, Frans A.; Ashby, Michael F. (Elsevier BV, 1982) -
Stiffness of the Crystal-Liquid Interface in a Hard-Sphere Colloidal System Measured from Capillary Fluctuations
Ramsteiner, I. B.; Weitz, David A.; Spaepen, Frans A. (American Physical Society (APS), 2010)Face-centered cubic single crystals of \(σ=1.55 μm\) diameter hard-sphere silica colloidal particles were prepared by sedimentation onto (100) and (110) oriented templates. The crystals had a wide interface with the ... -
Structural Relaxation of Amorphous \(Pd_{82}Si_{18}\): X-Ray Measurements, Electrical-Resistivity Measurements, and a Comparison Using the Ziman Theory
Chason, E.; Greer, A. L.; Kelton, K. F.; Pershan, Peter S.; Sorensen, L. B.; Spaepen, Frans A.; Weiss, A. H. (American Physical Society, 1985)Structural relaxation in amorphous \(Pd_{82}Si_{18}\) is studied using high-precision x-ray diffraction. The x-ray structure factor S(k) and the density ρ (determined from the x-ray absorption), are measured simultaneously ... -
Structure and Defects of Hard-Sphere Colloidal Crystals and Glasses
Jensen, Katharine Estelle (2013-08-21)Colloidal particles provide convenient and useful building blocks for creating ordered and disordered structures with length scales on the order of a micrometer. These structures are useful materials in their own right, ... -
Thin Film Complex Oxide Proton Conductors: Synthesis and Applications
Adam, Suhare A. (2016-05-17)The performance of ultra-thin film solid oxide fuel cells (μ-SOFC) is highly dependent on the structural, microstructural and transport properties of the electrolyte. The focus of this thesis is on understanding the effect ...