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Surface‐Charge‐Induced Reversible Phase Transitions of Bi Nanoparticles
Author(s) -
Wagner Jakob B.,
Willinger MarcGeorg,
Müller JensOliver,
Su Dang Sheng,
Schlögl Robert
Publication year - 2006
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200500243
Subject(s) - materials science , transmission electron microscopy , current density , cathode ray , nanoparticle , phase (matter) , current (fluid) , phase transition , nanometre , electron , condensed matter physics , beam (structure) , charge density , molecular physics , chemical physics , nanotechnology , optics , chemistry , composite material , physics , thermodynamics , organic chemistry , quantum mechanics
Phase transitions of nanometer‐sized supported Bi particles (such as that shown in the Figure) are studied as a function of the current density of the probing electron beam in transmission electron microscopy (TEM). As the current intensity increases the particles melt. However, further increasing the current density of the electron beam results in an apparent solidification of the Bi particles. The phase transitions are observed to be fully reversible upon varying the current density of the electron beam.