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Titolo:
Characterizing nanoparticle interactions: Linking models to experiments
Autore:
Ramakrishnan, S; Zukoski, CF;
Indirizzi:
Univ Illinois, Dept Chem Engn, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 s, Dept Chem Engn, Urbana, IL 61801 USA
Titolo Testata:
JOURNAL OF CHEMICAL PHYSICS
fascicolo: 3, volume: 113, anno: 2000,
pagine: 1237 - 1248
SICI:
0021-9606(20000715)113:3<1237:CNILMT>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
STABILIZED SILICA DISPERSIONS; ANGLE NEUTRON-SCATTERING; HARD-SPHERE DISPERSIONS; 2ND VIRIAL-COEFFICIENTS; LIQUID-PHASE-SEPARATION; SQUARE-WELL FLUID; MONTE-CARLO; LYSOZYME SOLUTIONS; PROTEIN SOLUTIONS; ATTRACTIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Ramakrishnan, S Univ Illinois, Dept Chem Engn, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 n, Urbana, IL 61801 USA
Citazione:
S. Ramakrishnan e C.F. Zukoski, "Characterizing nanoparticle interactions: Linking models to experiments", J CHEM PHYS, 113(3), 2000, pp. 1237-1248

Abstract

Self-assembly of nanoparticles involves manipulating particle interactionssuch that attractions are on the order of the average thermal energy in the system. If the self-assembly is to result in an ordered packing, an understanding of their phase behavior is necessary. Here we test the ability of simple pair potentials to characterize the interactions and phase behavior of silico tungstic acid (STA), a 1.2 nm particle. The strength of interaction is controlled by dispersing STA in different background salt concentrations. The experimental variables used in characterizing the interactions arethe osmotic compressibility (d Pi/d rho), the second virial coefficient (B-2), relative solution viscosity (eta/eta(c)), and the solubility (rho sigma(3))(sat). Various techniques are then developed to extract the parametersof square well, the adhesive hard sphere (AHS), and the Yukawa pair potentials that best describe the experimental data. The AHS model describes the solution thermodynamic behavior only where the system is weakly attractive but, as would be expected, fails when long range repulsions or nonmonotonicpair potentials become important. Model free representations are presentedwhich offer the opportunity to extract pair potential parameters. (C) 2000American Institute of Physics. [S0021-9606(00)51517-7].

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 15:35:39