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Now showing items 951-960 of 2111
First Principles Calculation of the Structure and Dielectric Properties of Bi2Ti2O7
(2010)
The structure, vibrational modes, and phonon contribution to the dielectric function of the pyrochlore
Bi
2
Ti
2
O
6
O
were calculated using first-principles methods. Total-energy minimization calculations were ...
Tunable effective nonlinear refractive index of graphene dispersions during the distortion of spatial self-phase modulation
(2014)
Spatial self-phase modulation (SSPM) was observed directly when a focused He-Ne laser beam at 633 nm went through liquid-phase-exfoliated graphene dispersions. The diffraction pattern of SSPM was found to be distorted ...
Hybrid DFT calculation of 57Fe NMR resonances and orbital order in magnetite
(2014)
The crystal structure and charge and orbital order of magnetite below the Verwey temperature are calculated
using a first-principles hybrid density functional theory (DFT) method. The initial atomic positions in ...
Optical and phonon excitations of modified Pandey chains at the Si(111)-2×1 surface
(2011)
The modified Pandey π-bonded chain structure for the (2×1) reconstruction of the Si(111) surface has two nearly degenerate structures in which one or the other of two atoms in the π chain is the outermost atom at the ...
Interaction of cationic surfactants with DNA: a single-molecule study
(2008)
The interaction of cationic surfactants with single
dsDNA molecules has been studied using forcemeasuring
optical tweezers. For hydrophobic
chains of length 12 and greater, pulling experiments
show characteristic ...
Spin scattering and spin-polarized hybrid interface states at a metal-organic interface
(2011)
Spin scattering at the interface formed between metallic Fe and Cu-phthalocyanine molecules is investigated by spin-polarized scanning tunneling spectroscopy and spin-resolved photoemission. The results are interpreted ...
Instrument for Label-Free Detection of Noncoding RNAs Journal of Sensors,
(2012)
We set up a label-free direct binding assay for the detection of noncoding RNAs. The assay is based on nanomechanical cantilever arrays for the detection of surface stress induced by immobilized biomolecules and their ...
Fast automated mineral differentiation using optical hyperspectral imaging
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)
The processing of mineral-bearing rocks in the mining industry is a highly energy and resource-intensive process. This has motivated the development of more effective ways to automatically sort valuable ore from barren ...
Piezoresistive Properties of 2D based Nanocomposites for Strain Sensing Applications
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)
The superlative piezoresistive properties of nanomaterials and their composites have attracted great interest in the area of strain sensing. The field has grown exponentially over the past decade, benefiting from the ...
The spatial uniformity and electromechanical stability of transparent, conductive films of single walled nanotubes
(2009)
We have prepared thin films of arc discharge single walled nanotubes by vacuum filtration. For film thicknesses greater than 40 nm, the films are of high optical quality; the optical transmission varies by <2% over the ...