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UPCONVERSION LUMINESCENCE ENHANCEMENT OF NaYF4:Yb3+, Er3+ NANOPARTICLES ON INVERSE OPAL SURFACE

LIAO, JIAYAN; YANG, ZHENGWEN; WU, HANGJUN; LAI, SHENFENG; … - In: Surface Review and Letters (SRL) 21 (2014) 01, pp. 1450017-1

Yb3+/Er3+ co-doped NaYF4 nanoparticles were deposited on the surfaces of the inverse opals, and their up …-conversion emission properties were investigated. The upconversion emissions of Yb3+/Er3+ co-doped NaYF4 nanoparticles on the inverse opal … surfaces have been enhanced when the upconversion emission bands of the nanoparticles are in the range of photonic band gaps of …

Persistent link: https://www.econbiz.de/10010883161

Local field dynamics in a resonant quantum tunneling system of magnetic molecules

Ohm, T.; Sangregorio, C.; Paulsen, C. - In: The European Physical Journal B - Condensed Matter and … 6 (1998) 2, pp. 195-199

We observed non-exponential relaxation for a quantum tunneling molecular magnetic system at very low temperatures and argue that it results from evolving intermolecular dipole fields. At the very beginning of the relaxation, the magnetization follows a square-root time dependence. A simple model...

Persistent link: https://www.econbiz.de/10010843624

Optical response of thin plasma-polymer films with non-spherical silver nanoparticles

Heilmann, A.; Quinten, M.; Werner, J. - In: The European Physical Journal B - Condensed Matter and … 3 (1998) 4, pp. 455-461

Persistent link: https://www.econbiz.de/10010843725

Review on nanostructured photoelectrodes for next generation dye-sensitized solar cells

Maçaira, José; Andrade, Luísa; Mendes, Adélio - In: Renewable and Sustainable Energy Reviews 27 (2013) C, pp. 334-349

classified into: (1) nanoparticles with high surface areas for efficient dye loading; (2) 1D nanostructures such as nanotubes and …

Persistent link: https://www.econbiz.de/10011049484

Production of biodiesel from Jatropha oil catalyzed by nanosized solid basic catalyst

Deng, Xin; Fang, Zhen; Liu, Yun-hu; Yu, Chang-Liu - In: Energy 36 (2011) 2, pp. 777-784

nanosized according to the calculations from XRD data. Because of their strong basicity, the nanoparticles were further used as …

Persistent link: https://www.econbiz.de/10011055167

Estimation of zeta potentials of titania nanoparticles by molecular simulation

English, Niall J.; Long, William F. - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 19, pp. 4091-4096

positively charged spherical rutile–titania nanoparticles with radii of 1.5 to 2.9 nm for two different salt concentrations in … the non-linear Poisson–Boltzmann (PB) equation for representative configurations of the nanoparticles, in addition to …-HS results some 15%–15% smaller than the numerical PB results for more highly charged nanoparticles. …

Persistent link: https://www.econbiz.de/10011057156

Monte Carlo simulation of the compensation and critical behaviors of a ferrimagnetic core/shell nanoparticle Ising model

Zaim, Ahmed; Kerouad, Mohamed - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 17, pp. 3435-3442

A Monte Carlo simulation has been used to study the magnetic properties and the critical behaviors of a single spherical nanoparticle, consisting of a ferromagnetic core of σ=±12 spins surrounded by a ferromagnetic shell of S=±1, 0 or S=±12, ±32 spins with antiferromagnetic interface...

Persistent link: https://www.econbiz.de/10011061451

Are there generic mechanisms governing interactions between nanoparticles and cells? Epitope mapping the outer layer of the protein–material interface

Lynch, Iseult - In: Physica A: Statistical Mechanics and its Applications 373 (2007) C, pp. 511-520

In this paper we discuss the possibility of a general paradigm for cell–biomaterial and cell–nanoparticle interactions. The basis of the paradigm is that the nature of the biomaterial or nanoparticle surface is not the important parameter, but rather the nature of the outermost layer of...

Persistent link: https://www.econbiz.de/10011063111

Nanoparticle technology for heavy oil in-situ upgrading and recovery enhancement: Opportunities and challenges

Hashemi, Rohallah; Nassar, Nashaat N.; Pereira Almao, Pedro - In: Applied Energy 133 (2014) C, pp. 374-387

With more than 170 billion barrels of estimated oil sands reserves in Canada, Canada has the third largest oil reserves in the world. However, more than 80% of oil sand’s reserves are located deep underground and could not be accessed by surface mining. Nonetheless, a number of in-situ...

Persistent link: https://www.econbiz.de/10010930629

INVESTIGATING ANNEALING EFFECT ON OPTICAL PROPERTIES OF Cd0.8Zn0.2S THIN FILMS

AZIZI, SOMAYEH; DIZAJI, HAMID REZAGHOLIPOUR; EHSANI, … - In: Surface Review and Letters (SRL) 21 (2014) 05, pp. 1450073-1

nanoparticles precursor synthesized using microwave irradiation method and optical properties of the films were studied using energy …

Persistent link: https://www.econbiz.de/10010933047