Materials Characterization & Imaging – Page 65

Overview of Overlapping Bio and Nano Technologies

Iyer S., LANL, US

“What is the connection between nanoscience and biology?” “What are biologists doing at Nanotech 2004 and why do you have so many “bio” related sessions?” “So biologists are also jumping on the nanoscience bandwagon.” These [...]

Bio Nano Analysis and Characterization

Glucose Sensor Based On Enzyme Entrapment In Polyacrylamide Microgels

Lopez-Cabarcos E., Retama B.R., Mecerreyes D., Lopez-Ruiz B., Universidad Complutense, ES

Glucose oxidase (GOx), was encapsulated in polyacrylamide microgels with the aim to preserve the enzymatic activity and to fabricate a biosensor with these microgel particles (1-3). The biosensor presents great stability, but when it is [...]

PCR Micro-Voume Device for Detection of Nucleic Acids

Auroux P-A, Day P., Niggli F., Manz A., Kinderspital, CH

The polymerase chain reaction (PCR) is an enzyme-mediated nucleic acid amplifer process that is employed extensively throughout the medical and biological sciences. The technique has risen to acclaim largely through its exquisite sensitivity, but an [...]

Molecular Recognition on Demand

Sherrill C., Marshall D., Richmond C., Scherrer C., Prudent J.R., EraGen Bioscience, Inc., US

DNA is the only chemistry that allows for ?molecular recognition on demand?. That is, unlike any other molecular recognition chemistry, DNA allows for the simple design and rapid synthesis of molecule sets that will recognize [...]

Nanoscale Bio-Molecular Control Using EC-OWLS

Bearinger J.P., Vörös J., Spencer N.D., Hubbell J.A., Textor M., ETH Zürich/ Lawrence Livermore National Laboratory, US

A new technique has been developed that combines evanescent-field optical sensing with electrochemical control of surface adsorption processes. This technique, termed Electrochemical Optical Waveguide Lightmode Spectroscopy (EC-OWLS), proved efficient in monitoring molecular surface adsorption and [...]

Bio-Molecular Analysis and Characterization

Mechanical and Electronic Properties of Strained Layer Superlattices Studied by Density Functional TB and Path Probability Methods

Masuda-Jindo K., Kikuchi R., Tokyo Institute of Technology, JP

The atomic and electronic structures of semiconductor heterostructures including steps, misfit dislocations and interface disorder are studied by using the density-functional tight-binding (TB) method. Atomic structures of misfit dislocations both edge type 1/2 (001) and [...]

Dislocation Processes and Deformation Twinning in Nanocrystalline Al

Yamakov V., Wolf D., Phillpot S.R., Gleiter H., Argonne National Lab, US

Using a recently developed, massively parallel molecular-dynamics (MD) code for the simulation of polycrystal plasticity, we analyze for the case of nanocrystalline Al the complex interplay among various dislocation and grain-boundary processes during low-temperature deformation. [...]

Theoretical Strength and Onset of Yielding in Nanoindentation

Sob M., Friák M., Vitek V., Academy of Sciences of the Czech Republic, CZ

Quantum-mechanical (ab initio) approach for determining theoretical (ideal) tensile and shear strength in metals and intermetallics is briefly outlined and as an example, tensile test for defect-free MoSi2 is simulated. Theoretical values of tensile and [...]