Quantitative analysis of gold nanoparticles from synchrotron data by means of least-squares techniques - Least-squares analysis of gold nanoparticles

被引:28
作者
Cervellino, A
Giannini, C
Guagliardi, A
Zanchet, D
机构
[1] CNR, IC, I-70125 Bari, Italy
[2] LNLS, BR-13084971 Campinas, SP, Brazil
关键词
D O I
10.1140/epjb/e2004-00342-3
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Powder samples of thiol-capped gold nanoparticles in the size range of 2-4 nm were quantitatively characterized by means of synchrotron X-ray diffraction data, with respect to their structure, size and strain distributions. A novel Rietveld-like approach was applied, refining domain size distribution, strain-size dependence and structure type concentrations. Three structure types (cuboctahedron, icosahedron, decahedron) were considered in this analysis and a detail study of the strain content was performed by comparing different models. The results showed a strong influence of the strain model and a careful analysis is presented. Final domain size and strain distributions agree well with the existence of both single-domain and imperfectly formed or multi-domain nanoparticles, but the final strain profiles seem to be mostly related to the different degree of structural perfection at different sizes as a result of the synthesis process. The present work represents an important step towards the development of robust methods to determine strain profiles in nanosystems, aiming to fulfill the description of these important but complex systems.
引用
收藏
页码:485 / 493
页数:9
相关论文
共 43 条
[1]   Controlled growth of gold nanoparticles during ligand exchange [J].
Brown, LO ;
Hutchison, JE .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (04) :882-883
[2]  
BRUST M, 1995, CHEM COMMUN, V16, P1655
[3]   SIZE EFFECT ON MELTING TEMPERATURE OF GOLD PARTICLES [J].
BUFFAT, P ;
BOREL, JP .
PHYSICAL REVIEW A, 1976, 13 (06) :2287-2298
[4]   Determination of nanoparticle structure type, size and strain distribution from X-ray data for monatomic f.c.c.-derived non-crystallographic nanoclusters [J].
Cervellino, A ;
Giannini, C ;
Guagliardi, A .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2003, 36 :1148-1158
[5]   Structural evolution of larger gold clusters [J].
Cleveland, CL ;
Landman, U ;
Shafigullin, MN ;
Stephens, PW ;
Whetten, RL .
ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1997, 40 (1-4) :503-508
[6]   Structural evolution of smaller gold nanocrystals: The truncated decahedral motif [J].
Cleveland, CL ;
Landman, U ;
Schaaff, TG ;
Shafigullin, MN ;
Stephens, PW ;
Whetten, RL .
PHYSICAL REVIEW LETTERS, 1997, 79 (10) :1873-1876
[7]   FOURIER-ANALYSIS OF POLYMER X-RAY-DIFFRACTION PATTERNS [J].
CRIST, B ;
COHEN, JB .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1979, 17 (06) :1001-1010
[8]   SIMULATED GOLD CLUSTERS AND RELATIVE EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE SPECTRA [J].
DAGOSTINO, G ;
PINTO, A ;
MOBILIO, S .
PHYSICAL REVIEW B, 1993, 48 (19) :14447-14451
[9]  
Dennis Jr. J.E., 1996, NUMERICAL METHODS UN, P86
[10]   Crystalline, shape, and surface anisotropy in two crystal morphologies of superparamagnetic cobalt nanoparticles by ferromagnetic resonance [J].
Diehl, MR ;
Yu, JY ;
Heath, JR ;
Held, GA ;
Doyle, H ;
Sun, SH ;
Murray, CB .
JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (33) :7913-7919