Sökning: "optical tweezers"

Visar resultat 21 - 25 av 35 avhandlingar innehållade orden optical tweezers.

  1. 21. Lab on a chip for electrophysiological measurements with control of the oxygen content : optical manipulation and spectroscopic analysis of biological cells

    Författare :Ahmed Alrifaiy; Ove Axner; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Medical Engineering for Healthcare; Medicinsk teknik för hälsovård;

    Sammanfattning : Stroke affects nearly 20 million people around the world every year. Clinically, stroke is a result of brain damage due to the shortage of oxygen delivered to the nerve cells. To minimize suffering and costs related to the disease, extensive research is performed on different levels. LÄS MER

  3. 22. A study of bacterial adhesion on a single-cell level by means of force measuring optical tweezers and simulations

    Författare :Oscar Björnham; Staffan Schedin; Ove Axner; Kirstine Berg-Sörensen; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; fysik; Physics; cell research; cellforskning; molecular cell biology; molekylär cellbiologi;

    Sammanfattning : The intriguing world of microbiology is nowadays accessible for detailed exploration at a single–molecular level. Optical tweezers are a novel instrument that allows for non–invasive manipulation of single cells by the sole use of laser light and operates on the nano– and micrometer scale which corresponds to the same length scale as living cells. LÄS MER

  4. 23. Plasmonics with a Twist: from Single Particles to Metasurfaces

    Författare :Robin Ogier; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; colloidal lithography; localized surface plasmons; circularly polarized light; metsurfaces; nanofabrication; chirality; optical trapping;

    Sammanfattning : Nanophotonics deals with how electromagnetic fields can be confined and squeezed to orders of dimensions below the light wavelength. Plasmonics, one of the fields of nanophotonics, study collective free electron oscillations driven by light in metallic nanostructures and interfaces. LÄS MER

  5. 24. Glycolytic oscillations in individual yeast cells

    Författare :Anna-Karin Gustavsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical manipulation; Microfluidics; Fluorescence microscopy; Single cell analysis; Saccharomyces cerevisiae; Glycolysis; Oscillations; NADH; Heterogeneity; Synchronization; Robustness; Universality;

    Sammanfattning : Oscillations in the concentration of yeast glycolytic intermediates have been intensively studied since the 1950s, but these studies have so far been limited to observations of average oscillatory behavior in synchronized cultures. Hence, it has remained unknown whether the onset of oscillations is a collective property of the population which requires a high cell density, or if individual cells can oscillate also in isolation. LÄS MER

  7. 25. Thermoplasmonic Effects in Microfluidic Systems

    Författare :Steven Jones; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; thermometry; thermoplasmonic bubbles; thermoplasmonics; plasmonics; thermophoresis;

    Sammanfattning : The field of plasmonics has enabled a plethora of scientific achievements over the past few decades. Such advances have been the result of the increased light-matter interaction that occurs over nanoscale dimensions facilitated by the localized plasmonic resonances supported by noble metal nanoparticles. LÄS MER