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Single molecule detection at surfaces

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Detection efficiency in total internal reflection fluorescence microscopy

Theo Lasser, Marcel Leutenegger

We present a rapid and flexible framework for the accurate calculation of the detection efficiency of fluorescence emission in isotropic media as well as in the vicinity of dielectric or metallic interfaces. The framework accounts for the dipole characteri ...

2008

Single molecule detection on surfaces

Marcel Leutenegger

Monitoring biological relevant reactions on the single molecule level based on fluorescence spectroscopy techniques has become one of the most promising approaches for understanding a variety of phenomena in biophysics, biochemistry and life science. By ap ...

EPFL2007

Repetitive Reversible Labeling of Proteins at Polyhistidine Sequences for Single-Molecule Imaging in Live Cells

Horst Vogel, Rudolf Hovius, Jean-Manuel Segura, Emmanuel Guignet

Sensitive live-cell fluorescence microscopy and single-molecule imaging are severely limited by rapid photobleaching of fluorescent probes. Herein, we show how to circumvent this problem using a novel, generic labeling strategy. Small nickel-nitrilotriacet ...

2007

Theory of resonantly enhanced near-field imaging

Demetri Psaltis

We investigate the fundamental issues of power transfer and far-field retrieval of subwavelength information in resonantly enhanced near-field imaging systems. It is found that high-quality resonance of the imaging system, such as that provided by dielectr ...

2007

Single molecule detection and fluorescence correlation spectroscopy on surfaces

Kai Hassler

In this thesis a new approach for single molecule detection and analysis is explored. This approach is based on the combination of two well established methods, fluorescence correlation spectroscopy (FCS) and total internal reflection fluorescence microsco ...

EPFL2006

The Colored Revolution of Bioimaging

Michaël Unser, Cédric René Jean Vonesch, François Aguet

With the recent development of fluorescent probes and new high-resolution microscopes, biological imaging has entered a new era and is presently having a profound impact on the way research is being conducted in the life sciences. Biologists have come to d ...

IEEE2006

Integrated nanoreactor system

Pierre-Yves Bolinger

This thesis describes a method that allows the production in parallel of nano-reactor systems whose function is controlled by a remote stimulus. The reactors comprise a nested system of lipid vesicles part of which release their content during a thermotrop ...

EPFL2006

Dual-color total internal reflection fluorescence cross- correlation spectroscopy

Theo Lasser, Marcel Leutenegger, Rainer Leitgeb

We present the development and first application of a novel dual-color total internal reflection (TIR) fluorescence system for single-molecule coincidence analysis and fluorescence cross-correlation spectroscopy (FCCS). As a performance analysis, we measur ...

2006

Fluorescence correlation spectroscopy

Ramachandra Rao

Fluorescence Correlation Spectroscopy (FCS) has become an important tool for measuring diffusion, concentration and molecular interactions in biomolecular systems. Two major requirements for FCS are good collection efficiency and a small and well defined e ...

EPFL2006

Dynamics of the 5-HT3A serotonin receptor in living cells

Emmanuel Guignet

The 5-HT3 serotonin receptor belongs to the cys-loop ligand-gated ion channel (LGIC) family. It is located in the central and peripheral nervous system and is implicated in certain pathologic situations. The 5-HT3 receptor is investigated here, as a typica ...

EPFL2006