author = "Bustamante, C."
1

Encontrado 6 documentos, página mostrada 1 de 1

Scanning tunneling microscopy imaging and selective modification of purple membranes

Description: The invention and development of the scanning tunneling microscope (STM) have opened new and original approaches for atomic- and nanometer-scale studies of surfaces. However, its application for imaging biomolecules has to overcome the poor electrical conductivity of biological samples. This article...
Language(s): Inglés

Physical parameters that control the imaging of purple membranes with the scanning tunneling microscope

Description: The dominant physical and geometrical parameters for imaging hydrated purple membranes with the scanning tunneling microscope are identified and characterized. These are sample voltage, current density, and tip radius. Purple membranes are imaged with vertical and lateral resolution of 0.7 nm and 15...
Language(s): Inglés

Condensation Transition in DNA-Polyaminoamide Dendrimer Fibers Studied Using Optical Tweezers

Description: When mixed together, DNA and polyaminoamide dendrimers form fibers that condense into a compact structure. We use optical tweezers to pull condensed fibers and investigate the decondensation transition by measuring force-extension curves (FECs). A characteristic force plateau (around 10 pN) and hyst...
Language(s): Inglés

Length control and sharpening of atomic force microscope carbon nanotube tips assisted by an electron beam

Description: We report on the precise positioning of a carbon nanotube on an atomic force microscope (AFM) tip. By using a nanomanipulator inside a scanning electron microscope, an individual nanotube was retrieved from a metal foil by the AFM tip. The electron beam allows us to control the nanotube length and t...
Language(s): Inglés

A very low current scanning tunneling microscope

Description: The applications of the scanning tunneling microscope (STM) in air are usually restricted to good conducting materials as clean metals, doped and passivated semiconductors, or to some molecular adsorbates deposited onto graphite. In order to study poor conducting materials as biological molecules, w...
Language(s): Inglés

Proofreading dynamics of a processive DNA polymerase

Description: Replicative DNA polymerases present an intrinsic proofreading activity during which the DNA primer chain is transferred between the polymerization and exonuclease sites of the protein. The dynamics of this primer transfer reaction during active polymerization remain poorly understood. Here we descri...
Language(s): Inglés
1

Encontrado 6 documentos, página mostrada 1 de 1

Uso de cookies: Este sitio web utiliza cookies propias y de terceros para dar un mejor servicio. Si continúa navegando se considera que acepta su uso. OKMás información