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Serguei Sekatski

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Publications associées (63)

Pre-selection of optical transitions in rare-earth ions in crystals perspective for quantum information processing

Serguei Sekatski

A systematic analysis of decoherence rates due to electron-phonon interactions for optical transitions of rare-earth dopant ions in crystals is presented in the frame of the point charge model. For this model, the large value of any one of the matrix eleme ...

Taylor & Francis2012

Nonkinetic Modeling of the Mechanical Unfolding of Multimodular Proteins: Theory and Experiments

Giovanni Dietler, Serguei Sekatski, Fabrizio Benedetti

We introduce and discuss a novel approach called back-calculation for analyzing force spectroscopy experiments on multimodular proteins. The relationship between the histograms of the unfolding forces for different peaks, corresponding to a different numbe ...

Elsevier2011

Ultrasharp carbon whisker optical fiber probes for scanning near-field optical microscopy

Giovanni Dietler, Mounir Driss Mensi, Serguei Sekatski, Andrey Mikhaylov

We report the growth of ultrasharp carbon whiskers onto apertured near-field optical glass fiber probes. The ultrasharp carbon whiskers are produced by the electron-assisted dissociation of residual oil vapors present in the vacuum chamber during the elect ...

SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA2010

Force spectroscopy of barnase-barstar single molecule interaction

Giovanni Dietler, Mélanie Favre, Serguei Sekatski, Dmitry Klinov, Andrey Mikhaylov

Results of the single molecule force spectroscopy study of specific interactions between ribonuclease barnase and its inhibitor barstar are presented. Experimental data obtained for the force loading rate ranging 2-70 nN/s are well approximated by a single ...

Wiley-Blackwell2010

Characterization of glycoprotein E C-End of West Nile virus and evaluation of its interaction force with alpha V beta 3 integrin as putative cellular receptor

Giovanni Dietler, Serguei Sekatski

Recombinant polypeptide containing the 260-466 amino acid sequence of West Nile virus (WNV) strain LEIV-Vlg99-27889-human glycoprotein E (gpE, E260-466) was constructed. Immunochemical similarity between the E260-466 and gpE of WNV was proven by enzyme imm ...

2010

Scanning Near-field Optical Microscopy-based Study of Local Dynamics of Receptor-Ligand Interactions at the Single Molecule Level

Giovanni Dietler, Mounir Driss Mensi, Serguei Sekatski, Kanat Dukenbayev

A scanning near-field optical microscope (SNOM)-based modification of the method to study the dynamics of single molecule receptor?ligand interactions exploiting the fluorescence imaging by total internal reflection fluorescence microscopy is introduced. T ...

2010

Near-field scanning optical microscopy using polymethylmethacrylate optical fiber probes

Giovanni Dietler, Mounir Driss Mensi, Serguei Sekatski, Kanat Dukenbayev

We report the first use of polymethylmethacrylate (PMMA) optical fiber-made probes for scanning near-field optical microscopy (SNOM). The sharp tips were prepared by chemical etching of the fibers in ethyl acetate, and the probes were prepared by proper gl ...

Elsevier2010

Stiffness Tomography by Atomic Force Microscopy

Charles Roduit, Giovanni Dietler, Sandor Kasas, Serguei Sekatski

The atomic force microscope is a convenient tool to probe living samples at the nanometric scale. Among its numerous capabilities, the instrument can be operated as a namo-indenter to gather information about the mechanical properties of the sample. In thi ...

2009

Complex studies of interactions between flaviviruses and laminin binding protein

Giovanni Dietler, Mélanie Favre, Serguei Sekatski

2009

Registration of long-range surface plasmon resonance by angle-scanning feedback and its implementation for optical hydrogen sensing

Giovanni Dietler, Serguei Sekatski

An optical technique devised for the detection of the ultrasharp angular resonance of long-range surface plasmons (LRSPs) is described. The LRSPs propagate along an 8 nm-thick palladium (Pd) film deposited on a one- dimensional photonic crystal structure a ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2009

Immunochernical and single molecule force spectroscopy studies of specific interaction between the laminin binding protein and the West Nile virus surface glycoprotein E domain II

Giovanni Dietler, Mélanie Favre, Serguei Sekatski

ELISA and Western blot immunochemical data attest an effective and highly specific interaction of the surface glycoprotein E domain II (DII) of the tick born encephalitis and Dengue viruses with the laminin binding protein (LBP). Based on a highly conserva ...

2008

Single molecule fluorescence resonance energy transfer scanning near-field optical microscopy

Giovanni Dietler, Serguei Sekatski

The first single molecule fluorescence resonant energy transfer scanning near-field optical microscope (FRET SNOM) images of CdSe nanocrystal (donor) deposited onto the glass slide surface are presented. Images were obtained using the earlier proposed FRET ...

Elsevier2008

Single-molecule avidin-biotin association reaction studied by force-clamp spectroscopy

Giovanni Dietler, Mélanie Favre, Serguei Sekatski

Using single-molecule force-clamp spectroscopy, where the distance between the AFM tip and the sample surface is fixed and a few parallel avidin-biotin complexes are kept stretched by a certain force, we were able to observe the formation of single avidin- ...

2008

Covalent attachment of proteins to calcite surface for the single molecule experiments

Serguei Sekatski

Two protocols of covalent attachment of proteins onto the calcite surface, viz. one using the metallochelat and second using the aminohexil, are elaborated. Single molecule force spectroscopy method has been used to test their efficiency and practical appl ...

2008

Scanning near-field optical microscope based on a double resonant fibre probe montage and equipped with time-gated photon detection

Giovanni Dietler, Serguei Sekatski, Kanat Dukenbayev

We discuss scanning near-field optical microscope based on original double resonant montage of a fibre probe onto the tuning fork and proprietary electronics capable of fast and precise measurements of the resonant frequency and the quality factor of senso ...

2008

Single-molecule force spectroscopy of a protein globule covalently bound to a calcite surface

Giovanni Dietler, Serguei Sekatski

Two methods of covalent grafting of a protein onto a calcite surface were developed. Single-molecule force spectroscopy was used to examine the characteristics of individual albumin-albumin polyclonal body complexes. The practical applicability of the prop ...

2008

Subwavelength-size local fluorescent sources based on color centers in LiF for scanning near-field optical microscopy

Giovanni Dietler, Serguei Sekatski

2007

Scanning near-field optical microscope based on double-resonant fiber probe montage and its operation in liquids - art. no. 67282D

Giovanni Dietler, Serguei Sekatski, Kanat Dukenbayev

The operation of the scanning near-field optical microscope based on the double-resonant montage of a fiber probe onto the tuning fork (working frequency of the latter, that is 32 kHz, coincides with the second resonance frequency of the bending oscillatio ...

SPIE2007

Experimental preparation of entangled Bell's vacuum-single exciton and vacuum-biexciton states for pair centers of neodymium ions in a crystal

Giovanni Dietler, Serguei Sekatski

2006

Quantum control of exciton states in clusters of resonantly interacting fluorescent particles using biharmonic laser pumping

Giovanni Dietler, Serguei Sekatski

2006

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