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Showing 1 to 12 of 39 entries
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Surface plasmon resonance in gold nanoparticles: a review.

Journal of physics. Condensed matter : an Institute of Physics journal

Amendola V, Pilot R, Frasconi M, Maragò OM, Iatì MA.
PMID: 28426435
J Phys Condens Matter. 2017 May 24;29(20):203002. doi: 10.1088/1361-648X/aa60f3.

In the last two decades, plasmon resonance in gold nanoparticles (Au NPs) has been the subject of intense research efforts. Plasmon physics is intriguing and its precise modelling proved to be challenging. In fact, plasmons are highly responsive to...

Photonic Torque Microscopy of the Nonconservative Force Field for Optically Trapped Silicon Nanowires.

Nano letters

Irrera A, Magazzù A, Artoni P, Simpson SH, Hanna S, Jones PH, Priolo F, Gucciardi PG, Maragò OM.
PMID: 27280642
Nano Lett. 2016 Jul 13;16(7):4181-8. doi: 10.1021/acs.nanolett.6b01059. Epub 2016 Jun 13.

We measure, by photonic torque microscopy, the nonconservative rotational motion arising from the transverse components of the radiation pressure on optically trapped, ultrathin silicon nanowires. Unlike spherical particles, we find that nonconservative effects have a significant influence on the...

Observation of the scissors mode and evidence for superfluidity of a trapped bose-einstein condensed Gas.

Physical review letters

Marago OM, Hopkins SA, Arlt J, Hodby E, Hechenblaikner G, Foot CJ.
PMID: 11017208
Phys Rev Lett. 2000 Mar 06;84(10):2056-9. doi: 10.1103/PhysRevLett.84.2056.

We report the observation of the scissors mode of a Bose-Einstein condensed gas of 87Rb atoms in a magnetic trap, which gives direct evidence of superfluidity in this system. The scissors mode of oscillation is excited by a sudden...

Rotation detection in light-driven nanorotors.

ACS nano

Jones PH, Palmisano F, Bonaccorso F, Gucciardi PG, Calogero G, Ferrari AC, Maragó OM.
PMID: 19856981
ACS Nano. 2009 Oct 27;3(10):3077-84. doi: 10.1021/nn900818n.

We analyze the rotational dynamics of light driven nanorotors, made of nanotube bundles and gold nanorods aggregates, with nonsymmetric shapes, trapped in optical tweezers. We identify two different regimes depending on dimensions and optical properties of the nanostructures. These...

Single wall carbon nanotubes deposited on stainless steel sheet substrates as novel counter electrodes for ruthenium polypyridine based dye sensitized solar cells.

Dalton transactions (Cambridge, England : 2003)

Calogero G, Bonaccorso F, Maragò OM, Gucciardi PG, Di Marco G.
PMID: 20200718
Dalton Trans. 2010 Mar 21;39(11):2903-9. doi: 10.1039/b917954b. Epub 2010 Feb 08.

We report on the implementation of stainless steel foils coated with dispersed Single Wall Carbon Nanotubes as novel, low cost and highly efficient counter electrodes for dye sensitized solar cells (DSSCs). We use commercially available non purified nanotubes dispersed...

Optical trapping of nanotubes with cylindrical vector beams.

Optics letters

Donato MG, Vasi S, Sayed R, Jones PH, Bonaccorso F, Ferrari AC, Gucciardi PG, Maragò OM.
PMID: 23381264
Opt Lett. 2012 Aug 15;37(16):3381-3. doi: 10.1364/OL.37.003381.

We use laser beams with radial and azimuthal polarization to optically trap carbon nanotubes. We measure force constants and trap parameters as a function of power showing improved axial trapping efficiency with respect to linearly polarized beams. The analysis...

Fano-Doppler laser cooling of hybrid nanostructures.

ACS nano

Ridolfo A, Saija R, Savasta S, Jones PH, Iatì MA, Maragò OM.
PMID: 21806014
ACS Nano. 2011 Sep 27;5(9):7354-61. doi: 10.1021/nn2022364. Epub 2011 Aug 04.

Laser cooling the center-of-mass motion of systems that exhibit Fano resonances is discussed. We find that cooling occurs for red or blue detuning of the laser frequency from resonance depending on the Fano factor associated with the resonance. The...

The Temple Scroll: Reconstructing an ancient manufacturing practice.

Science advances

Schuetz R, Maragh JM, Weaver JC, Rabin I, Masic A.
PMID: 31523710
Sci Adv. 2019 Sep 06;5(9):eaaw7494. doi: 10.1126/sciadv.aaw7494. eCollection 2019 Sep.

The miraculously preserved 2000-year-old Dead Sea Scrolls, ancient texts of invaluable historical significance, were discovered in the mid-20th century in the caves of the Judean desert. The texts were mainly written on parchment and exhibit vast diversity in their...

Vortex nucleation in Bose-Einstein condensates in an oblate, purely magnetic potential.

Physical review letters

Hodby E, Hechenblaikner G, Hopkins SA, Maragò OM, Foot CJ.
PMID: 11800928
Phys Rev Lett. 2002 Jan 07;88(1):010405. doi: 10.1103/PhysRevLett.88.010405. Epub 2001 Dec 19.

We have investigated the formation of vortices by rotating the purely magnetic potential confining a Bose-Einstein condensate. We modified the bias field of an axially symmetric TOP trap to create an elliptical potential that rotates in the radial plane....

Optical trapping of porous silicon nanoparticles.

Nanotechnology

Donato MG, Monaca MA, Faggio G, Stefano LD, Jones PH, Gucciardi PG, Maragò OM.
PMID: 22108540
Nanotechnology. 2011 Dec 16;22(50):505704. doi: 10.1088/0957-4484/22/50/505704. Epub 2011 Nov 23.

Silicon nanoparticles obtained by ball-milling of a 50% porosity silicon layer have been optically trapped when dispersed in a water-surfactant environment. We measured the optical force constants using linearly and radially polarized trapping beams finding a reshaping of the...

Surface-enhanced Raman spectroscopy in 3D electrospun nanofiber mats coated with gold nanorods.

Analytical and bioanalytical chemistry

Camposeo A, Spadaro D, Magrì D, Moffa M, Gucciardi PG, Persano L, Maragò OM, Pisignano D.
PMID: 26670770
Anal Bioanal Chem. 2016 Feb;408(5):1357-64. doi: 10.1007/s00216-015-9226-9. Epub 2015 Dec 15.

Nanofibers functionalized by metal nanostructures and particles are exploited as effective flexible substrates for surface-enhanced Raman scattering (SERS) analysis. Their complex three-dimensional structure may provide Raman signals enhanced by orders of magnitude compared to untextured surfaces. Understanding the origin...

Polarization-dependent optomechanics mediated by chiral microresonators.

Nature communications

Donato MG, Hernandez J, Mazzulla A, Provenzano C, Saija R, Sayed R, Vasi S, Magazzù A, Pagliusi P, Bartolino R, Gucciardi PG, Maragò OM, Cipparrone G.
PMID: 24710344
Nat Commun. 2014 Apr 08;5:3656. doi: 10.1038/ncomms4656.

Chirality is one of the most prominent and intriguing aspects of nature, from spiral galaxies down to aminoacids. Despite the wide range of living and non-living, natural and artificial chiral systems at different scales, the origin of chirality-induced phenomena...

Showing 1 to 12 of 39 entries