TITLE

Dynamics of gold nanoparticles in a polymer melt

AUTHOR(S)
Grabowski, Christopher A.; Adhikary, Bijoy; Mukhopadhyay, Ashis
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/12/2009, Vol. 94 Issue 2, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Gold nanoparticles are used as a luminescent contrast agent to study size-dependent dynamics in polymer matrix. The experiments measured the diffusion coefficient of particles in poly(butyl methacrylate) melt by tracking their motion within a diffraction-limited focus of a laser with 150 fs pulses at 800 nm. Our results indicate that for unentangled polymers, when the particle radius (R) is greater than the gyration radius (Rg) of the chain, the Stokes–Einstein relation can accurately predict particle dynamics. For longer chains, if the entanglement mesh length is larger than R, the particle diffuses ∼250 times faster than predicted by the Stokes–Einstein relation.
ACCESSION #
36258505

 

Related Articles

  • Structure and dynamics of ring polymers. Brown, Scott; Szamel, Grzegorz // Journal of Chemical Physics;3/22/1998, Vol. 108 Issue 12, p4705 

    Examines the equilibrium structure and dynamics of unconcatenated unknotted polymer rings in the melt. Comparison of the rings in the melt with the linear chains; Observation on the ring diffusion; Estimation of center-of-mass self-diffusion coefficient and orientational relaxation time.

  • Dynamical properties of randomly cross-linked polymer melts: A Monte Carlo study. I. Diffusion dynamics. Sommer, Jens-Uwe; Schulz, Michael; Trautenberg, Hans L. // Journal of Chemical Physics;5/1/1993, Vol. 98 Issue 9, p7515 

    In the framework of the bond-fluctuation method, we have studied the diffusion properties of randomly cross-linked polymer melts. From the connectivity matrices of simulated network samples, their ideal diffusion behavior was calculated. The resulting functions were compared with data from Monte...

  • Laser-induced periodic surface structures on different poly-carbonate films. Csete, M.; Marti, O.; Bor, Zs. // Applied Physics A: Materials Science & Processing;2001, Vol. 73 Issue 4, p521 

    Laser-induced periodic surface structures (LIPSS) were generated on oriented and amorphous thick, as well as on spin-coated thin, poly-carbonate films by polarized ArF excimer laser light. The influence of the film structure and thickness on the LIPSS formation was demonstrated. Below a critical...

  • Analytic liquid-state theory of the interactions between colloids mediated by reversibly adsorbed polymers. Chervanyov, A. I. // Journal of Chemical Physics;12/282014, Vol. 141 Issue 24, p1 

    We develop an analytic liquid-state theory of the effective interactions induced by reversibly adsorbing polymers, acting between colloids immersed in a polymer melt. This theory is based on the polymer reference interaction site model that has no restrictions with respect to the density of the...

  • Improvement of UV emission from highly crystalline ZnO nanoparticles by pulsed laser ablation under O2/He glow discharge. Ma, Qiang; Saraswati, Teguh Endah; Ogino, Akihisa; Nagatsu, Masaaki // Applied Physics Letters;1/31/2011, Vol. 98 Issue 5, p051908 

    Pulsed laser ablation under an O2/He glow discharge was studied to improve the surface crystallinity and UV luminescence of ZnO nanoparticles ∼10 nm in size. X-ray photoemission spectroscopy, scanning transmission electron microscopy, and cathodoluminescence spectroscopy were used to...

  • Correlation between the Soret coefficient and the static structure factor in a polymer blend. Enge, W.; Köler, W. // European Physical Journal E -- Soft Matter;Nov2004, Vol. 15 Issue 3, p265 

    Mutual mass diffusion and thermal diffusion has been investigated in poly(dimethylsiloxane)/ poly(ethylmethylsiloxane) (PDMS/PEMS) polymer blends of equal weight fractions. Molar masses ranged from below 1 to over 20 kg/mol. Both the mutual mass (D) and the thermal diffusion (DT) coefficient...

  • Thermodynamic scaling of dynamics in polymer melts: Predictions from the generalized entropy theory. Xu, Wen-Sheng; Freed, Karl F. // Journal of Chemical Physics;Jun2013, Vol. 138 Issue 23, p234501 

    Many glass-forming fluids exhibit a remarkable thermodynamic scaling in which dynamic properties, such as the viscosity, the relaxation time, and the diffusion constant, can be described under different thermodynamic conditions in terms of a unique scaling function of the ratio ργ/T, where...

  • Matrix-induced nanoparticle interactions in a polymer melt: A molecular dynamics simulation study. Bedrov, Dmitry; Smith, Grant D.; Smith, James S. // Journal of Chemical Physics;11/15/2003, Vol. 119 Issue 19, p10438 

    A molecular dynamics simulation study of the influence of a polymer melt matrix consisting of bead-necklace polymers on the effective interaction between two spherical nanoparticles was performed. The potential of mean force (POMF) between the two nanoparticles as well as entropy and energy...

  • Controlling the dispersion and orientation of nanorods in polymer melt under shear: Coarse-grained molecular dynamics simulation study. Jay Hoon Park; Vibha Kalra; Yong Lak Joo // Journal of Chemical Physics;3/28/2014, Vol. 140 Issue 12, p124903-1 

    Incorporation of nanorods (NRs) into a polymer matrix can greatly enhance the material properties, but the aggregation of NRs prevents the full realization of their potential. Using coarsegrained molecular dynamics simulation with the dissipative particle dynamics thermostat, we have...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics