Collaboration for pharmaceutical engineering and science
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ViewStruct : A Tool for Visualizing Crystal Structures - Documentation and Downloads
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19 Apr 2024 | Downloads
ViewStruct is a program that visualizes crystal structures and that can calculate and visualize the corresponding crystal graph. The crystal graph is a formalization that stems from the Hartman–Perdok (HP) theory [3, 4, 5]. HP theory addresses crystal growth and is particularly useful to predict...
Discussion on Hamaker Constant
19 Apr 2024 | Publications
The Hamaker constant is a force constant used for describing the van der Waals (vdW) force. The magnitude of the Hamaker constant reflects the strength of the vdW force between two particles, or between a particle and a substrate. It depends on the material properties of both the interacting...
Particle Adhesion
19 Apr 2024 | Tools
Particle and Thin Film Adhesion
19 Apr 2024 | Series
The adhesion of micron and sub-micron scale particles to surfaces is of tremendous interest in a wide range of industrial and civilian applications. We measure directly the adhesion of particles to surfaces using atomic force microscopy and develop experimentally-validated, science-based models...
Simulation of the Adhesion of Particles to Surfaces
The removal of micrometer and submicrometer particles fromdielectric and metal films represents a challenge in postchemicalmechanical polishing cleaning. Proper modeling of the adhesiveforce between contaminant particles and these films is needed todevelop optimal solutions to postchemical...
Hamaker Constants in Integrated Circuit Metallization
A new method for determining Hamaker constants was examinedfor materials of interest in integrated circuit manufacture. Anultra-high vacuum atomic force microscope and an atomic force microscopeoperated in a nitrogen environment were used to measurethe interaction forces between metals,...
A Theoretical and Experimental Study of Surface Forces in Adhesion of Particles to Thin Films
The interactions between micron- and nano-particles and rough surfaces are of great importance and have numerous applications in surface science and biotechnology. It is essential to have estimates of surface/intermolecular forces between interacting bodies to describe and to manipulate the...