In situ TEM observation of lithium nanoparticle growth and morphological cycling

被引：37

作者：

Ghatak, Jay ^{[1
]}

Guan, Wei ^{[1
]}

Moebus, Guenter ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

NANOSCALE | 2012年 / 4卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

ELECTRON-BEAM RESIST; ENERGY-LOSS SPECTROSCOPY; F-AGGREGATE CENTERS; ALKALI-HALIDES; SINGLE-CRYSTALS; NM SCALE; FLUORIDE; ION; LIF; TRANSITION;

D O I：

10.1039/c2nr11546h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lithium fluoride crystals were subjected to electron beam irradiation at 200 and 300 keV using transmission electron microscopy in order to study in situ fabrication of Li nanostructures. We observed that LiF crystals decompose in a unique way different to all other metal halides: Fluorine ablation and salt-to-metal conversion is non-local and due to a rapid lateral diffusion of Li, the life cycle from nucleation to annihilation of fresh Li nano-crystals can be observed at a distance from the Li-source, the irradiated salt. Growth, shape transition and annihilation of Li nanostructures follow at slow enough speed for live video recording with resolution of 25 frames per second. The equilibrium shapes of pure Li nano-crystals range from cubic to rod-shaped and ball-shaped and up to 300 nm size. By varying the e-beam flux of irradiation, transitions from cube to spherical shape can be induced cyclically.

引用

页码：1754 / 1759

页数：6

共 41 条

[1] EXPERIMENTAL-EVIDENCE FOR QUASIMELTING IN SMALL PARTICLES [J].

AJAYAN, PM ;

MARKS, LD .

PHYSICAL REVIEW LETTERS, 1989, 63 (03) :279-282

[2] Electron-beam induced crystallization transition in self-developing amorphous AlF3 resists [J].

Chen, GS ;

Boothroyd, CB ;

Humphreys, CJ .

APPLIED PHYSICS LETTERS, 1996, 69 (02) :170-172

[3] EELS spectroscopy of iron fluorides and FeFx/C nanocomposite electrodes used in Li-ion batteries [J].

Cosandey, Frederic ;

Al-Sharab, Jafar F. ;

Badway, Fadwa ;

Amatucci, Glenn G. ;

Stadelmann, Pierre .

MICROSCOPY AND MICROANALYSIS, 2007, 13 (02) :87-95

[4] ELECTRON ENERGY-LOSS SPECTROSCOPY AND CHEMICAL-CHANGE [J].

EGERTON, RF ;

CROZIER, PA ;

RICE, P .

ULTRAMICROSCOPY, 1987, 23 (3-4) :305-312

[5] Focused ion beam nanolithography on AlF3 at a 10 nm scale [J].

Gierak, J ;

Vieu, C ;

Launois, H ;

BenAssayag, G ;

Septier, A .

APPLIED PHYSICS LETTERS, 1997, 70 (15) :2049-2051

[6] In situ synthesis of cobalt nanocrystal hierarchies in a transmission electron microscope [J].

Gnanavel, Thirunavukkarasu ;

Moebus, Guenter .

JOURNAL OF NANOPARTICLE RESEARCH, 2012, 14 (03)

[7] In-Situ Fabrication of Three Dimensional Nickel Nanobeads by Electron Beam Induced Transformation [J].

Gnanavel, Thirunavukkarasu ;

Kumar, Saurabh ;

Moebus, Guenter .

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2011, 11 (02) :1019-1024

[8]

Gnanavel Thirunavukkarasu, 2010, THESIS U SHEFFIELD

[9] DISPLACEMENT OF LITHIUM ION IN LITHIUM-FLUORIDE BY ACCELERATED ELECTRONS [J].

HERRMANN, F ;

PINARD, P ;

FARGE, Y .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1974, 7 (11) :L199-L201

[10] PROPOSED EXCITONIC MECHANISM OF COLOR-CENTER FORMATION IN ALKALI HALIDES [J].

HERSH, HN .

PHYSICAL REVIEW, 1966, 148 (02) :928-&

← 1 2 3 4 5 →