Zobrazeno 1 - 10
of 75
pro vyhledávání: '"H. M. Nussenzveig"'
Autor:
L. B. Pires, D. S. Ether, B. Spreng, G. R. S. Araújo, R. S. Decca, R. S. Dutra, M. Borges, F. S. S. Rosa, G.-L. Ingold, M. J. B. Moura, S. Frases, B. Pontes, H. M. Nussenzveig, S. Reynaud, N. B. Viana, P. A. Maia Neto
Publikováno v:
Physical Review Research, Vol 3, Iss 3, p 033037 (2021)
We measure the colloidal interaction between two silica microspheres in an aqueous solution in the distance range from 0.2 to 0.5μm with the help of optical tweezers. When employing a sample with a low salt concentration, the resulting interaction i
Externí odkaz:
https://doaj.org/article/e80d6a7be0a44f4ca4ce93569e412496
Autor:
Bruno Pontes, G. R. S. Araújo, D. S. Ether, P. A. Maia Neto, Susana Frases, Serge Reynaud, Nathan B. Viana, Ricardo S. Decca, L. B. Pires, Felipe S. S. Rosa, Gert-Ludwig Ingold, M. J. B. Moura, R. S. Dutra, H. M. Nussenzveig, M. Borges, B. Spreng
Publikováno v:
Physical Review Research
Physical Review Research, American Physical Society, 2021, 3 (3), pp.033037. ⟨10.1103/PhysRevResearch.3.033037⟩
Physical Review Research, American Physical Society, 2021, 3 (3), pp.033037. ⟨10.1103/PhysRevResearch.3.033037⟩
We measure the colloidal interaction between two silica microspheres in aqueous solution in the distance range from $0.2\,\mu$m to $0.5\,\mu$m with the help of optical tweezers. When employing a sample with a low salt concentration, the resulting int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e335be43efb75b03665d0566531be369
https://hal.archives-ouvertes.fr/hal-03283296
https://hal.archives-ouvertes.fr/hal-03283296
Autor:
P. A. Maia Neto, R. S. Dutra, Bruno Pontes, L. B. Pires, Glauber R. de S. Araújo, Fran Gómez, H. M. Nussenzveig, Nathan B. Viana
Publikováno v:
Physical Review Applied. 15
We derive an explicit partial-wave (Mie) series for the image of a dielectric microsphere collected by a typical infinity-corrected microscope. We model the propagation of the illumination and scattered vector fields through the optical components of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5459745748353e552ffcbbc9a82d899
https://doi.org/10.1103/physrevapplied.15.064012
https://doi.org/10.1103/physrevapplied.15.064012
Autor:
Bruno Pontes, Luciana Romão, Marcos Farina, Nathan B. Viana, Juliana G. M. Soares, H. M. Nussenzveig, Diana Matias, C. Santana, G. R. S. Araújo, Susana Frases, Vivaldo Moura-Neto
Neural stem cells differentiate into several cell types that display distinct functions. However, little is known about how cell surface mechanics vary during the differentiation process. Here, by precisely measuring membrane tension and bending modu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14c7504f827b8e40df2a978b4b9cb0a8
https://doi.org/10.1101/2020.04.03.019950
https://doi.org/10.1101/2020.04.03.019950
We show that the optical force field in optical tweezers with elliptically polarized beams has the opposite handedness for a wide range of particle sizes and for the most common configurations. Our method is based on the direct observation of the par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1d7482af4962356199d10d88a68cf85
http://arxiv.org/abs/1901.09370
http://arxiv.org/abs/1901.09370
Publikováno v:
SPIE Proceedings.
In this paper will be reported the principal results about absolute calibration of optical tweezers that we have published at reference.1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9017e48d2f972ee6e346319d3db20a75
https://doi.org/10.1117/12.2230139
https://doi.org/10.1117/12.2230139
Publikováno v:
Dutra, R D S, Neto, P A M, Nussenzveig, H M & Flyvbjerg, H 2016, ' Theory of optical-tweezers forces near a plane interface ', Physical Review A (Atomic, Molecular and Optical Physics), vol. 94, no. 5, 053848 . https://doi.org/10.1103/PhysRevA.94.053848
Optical-tweezers experiments in molecular and cell biology often take place near the surface of the microscope slide that defines the bottom of the sample chamber. There, as elsewhere, force measurements require force-calibrated tweezers. In bulk, on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4702eff044af891b74c6ba079425409e
https://orbit.dtu.dk/en/publications/5c07191a-8c8a-4ea8-abe7-02426f526388
https://orbit.dtu.dk/en/publications/5c07191a-8c8a-4ea8-abe7-02426f526388
Publikováno v:
Journal of Optics A: Pure and Applied Optics. 9:S221-S227
We extend the MDSA (Mie–Debye spherical aberration) theory of trapping forces in optical tweezers, previously developed for circularly polarized trapping beams, to linear polarization. Although it does not significantly affect the trap stiffness, l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4124056708f1c767c4e5c6d08c373bc9
https://doi.org/10.1088/1464-4258/9/8/s15
https://doi.org/10.1088/1464-4258/9/8/s15
Publikováno v:
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences. 459:3021-3041
Starting from a Debye-type integral representation valid for a laser beam focused through a high numerical aperture objective, we derive an explicit partial-wave (Mie) representation for the force exerted on a dielectric sphere of arbitrary radius, p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::217f717d753c8288d5253c95c8247b89
https://doi.org/10.1098/rspa.2003.1164
https://doi.org/10.1098/rspa.2003.1164
Publikováno v:
Physical Review A. 90
The absolute calibration of optical tweezers has been demonstrated by including the aberration effects of the optical system into the theoretical framework, thereby opening the door to an improved instrument design, reliable force measurements, and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8820062416785d69618aca1e7c2cadd7
https://doi.org/10.1103/physreva.90.013825
https://doi.org/10.1103/physreva.90.013825