TITLE

Nanoscale stiffness of individual dendritic molecules and their aggregates

AUTHOR(S)
Tsukruk, Vladimir V.; Shulha, Hennady; Zhai, Xiaowen
PUB. DATE
February 2003
SOURCE
Applied Physics Letters;2/10/2003, Vol. 82 Issue 6, p907
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We demonstrate that carefully designed micromapping of the surface stiffness with nanoscale resolution could reveal quantitative data on the elastic properties of compliant, dendritic organic molecules with nanoparticulate dimensions below 3 nm. Much higher elastic modulus was observed for individual, fourth generation dendritic molecules due to their more shape persistent conformation. Large, reversible, elastic deformation is a distinct characteristic of the nanomechanical response observed for individual dendritic molecules. Such a "rubbery" response could be an indication of spatial constraints imposed on vitrification of dendritic molecules tethered to the functionalized interface. Surprisingly, an increased stiffness was also found for the third generation dendritic molecules within long aggregates.
ACCESSION #
9036499

 

Related Articles

  • A Correlation between Partial Discharge Characteristics and Dendrite Growth Stages in Polyethylene Insulation. Rezinkina, M. M.; Rezinkin, O. L.; Nosenko, M. I. // Technical Physics;Mar2001, Vol. 46 Issue 3, p339 

    � 2001 MAIK �Nauka / Interperiodica�.

  • The Simulation of Dendrite Growth and Partial Discharges in Epoxy Resin. Noskov, M. D.; Malinovski, A. S.; Sack, M.; Schwab, A. J. // Technical Physics;Feb2002, Vol. 47 Issue 2, p260 

    A self-consistent model of the development of dendrites and partial discharges in a dielectric solid under a variable voltage is suggested. Dendrites originate at sites with the enhanced local field strength and also where the dielectric is broken down under the action of partial discharges. The...

  • Narrow fingers in a Hele�Shaw cell. Kopf-Sill, Anne R.; Homsy, G. M. // Physics of Fluids (00319171);Sep87, Vol. 30 Issue 9, p2607 

    Narrow fingers that occupy much less than one-half the cell width have been observed in a carefully prepared Hele�Shaw cell. These fingers sometimes show dendritic instability. They are in most respects similar to those produced artificially by Couder et al. [Phys. Rev. A 34, 5175 (1986);...

  • Rensselaer forms link to shuttle. C.M. // Electronic Design;5/28/96, Vol. 44 Issue 11, p30 

    Reports on the Isothermal Dendritic Growth Experiment aboard the space shuttle Columbia is about how dendritic crystals form in metals and alloys using the microgravity of space. Use of experiment information in the production of everything from aluminum foil to cars.

  • Trim Those Whiskers. HUNT, CHRIS // Printed Circuit Design & Fab: Circuits Assembly;Jul2013, Vol. 30 Issue 7, p42 

    The article talks about dendrite growth between two terminations on a chip component with voltage applied.

  • Microstructures of undercooled Si. Leung, K. K.; Kui, H. W. // Journal of Applied Physics;1/15/1994, Vol. 75 Issue 2, p1216 

    Presents information on a study that concluded that undercooled silicon crystallization is dendritic in nature. Experimental procedure; Results and discussion on the study.

  • Mechanism of the transition from fractal to dendritic growth of surface aggregates. Brune, Harald; Romainczyk, Christoph // Nature;6/9/1994, Vol. 369 Issue 6480, p469 

    Discusses the crossover from fractal to dendritic growth of surface aggregation of silver atoms in two dimensions on the microscopic scale. Anisotropy's predominance over random noise in the growth process; Use of scanning tunneling microscope (STM); Diffusion-limited aggregation (DLA) of...

  • Hoarfrost patterns. Bruter, C.P. // Mathematical Intelligencer;Winter97, Vol. 19 Issue 1, p37 

    Discusses mathematical implications of hoarfrost or icy dendrite pattern formation. Sighting of an artistic arabesque; Difficulty of modeling the growth of dendritic patterns deterministically; Partial equations of second order with Cauchy's condition involved in a possible modeling.

  • Hysteresis and magnetostriction of Tb...Dy...Ho...Fe...[112] dendritic rods. Wun-Fogle, M.; Restorff, J.B. // Journal of Applied Physics;4/15/1999 Part 2B of 2, Vol. 85 Issue 8, p6253 

    Discusses the measurement of magnetization and magnetostriction of a variety of terbium-dysprosium-holmium-iron dendritic rods. Methodology of the study; Experimental results.

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