Electronic proper,es of supracrystals of Au nanocrystals: influence of thickness and nanocrystallinity P Yang1, I Arfaoui1, T Cren2, N Goubet1 and M P Pileni1*
1Laboratoire des Matériaux Mésoscopiques et Nanométriques (LM2N), Université Pierre et Marie Curie, and CNRS UMR 7070, 4 Place Jussieu, 75005 Paris, France 2Ins,tut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie, and CNRS UMR 7588, 4 Place Jussieu, 75005 Paris, France
Introduction Well-defined superlattices of colloidal nanocrystals, called supracrystals, are expected to have interesting physical properties. While the electronic properties of thin supracrystals were extensively studied in planar configuration, few are known about the electron transport through micrometer-thick supracrystals. Here, we investigated the electronic properties of supracrystals made of Au nanocrystals with diameters of 5, 6, 7 and 8 nm using scanning tunneling microscopy/spectroscopy at low temperature.
Typical scanning electron microscopy (SEM) images of (a) interfacial and thin supracrystals, (b) precipitated supracrystals. Typical scanning tunneling microscopy (STM) images of (c) thin, (d) interfacial, and (e) precipitated supracrystals made of 7 nm Au nanocrystals.
The TEM images of Au nanocrystals with diameter of (a) 6 nm, (b) 7 nm, and (c) 8 nm, respec,vely. Insets: the corresponding size distribu,ons, which are determined by measuring the diameter of nanocrystals sta,s,cally from several TEM images.
Log-‐log plot of normalized average I-‐V curves of (a) thin, (b) interfacial, and (c) precipitated supracrystals made of 6 nm, 7 nm, and 8 nm nanocrystals, respec,vely, at 78 K and 5K. w ISSN 0953-8984 Journal of Physics Condensed Matter
Journal of Physics
Condensed Matter
Volume 25 Number 33 21 August 2013 VIEWPOINT
331001
Flexoelectric spectroscopy J F Scott
333201
Advances in first-principles modelling of point defects in UO2 : f electron correlations and the issue of local energy minima B Dorado, M Freyss, B Amadon, M Bertolus, G Jomard and P Garcia
Journal of Physics
Condensed Matter
TOPICAL REVIEW
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Transport in semiconductor nanowire superlattices described by coupled quantum mechanical and kinetic models M Alvaro, L L Bonilla, M Carretero, R V N Melnik and S Prabhakar
335302
Electronic properties of supracrystals of Au nanocrystals: influence of thickness and nanocrystallinity P Yang, I Arfaoui, T Cren, N Goubet and M P Pileni
335401
Structural and magnetic studies of the electron doped manganites Sr0.65 Pr0.35−x Cex MnO3 (0.00 ! x ! 0.35) S´everine Heyraud, Peter E R Blanchard, Samuel Liu, Qingdi Zhou, Brendan J Kennedy, Helen E A Brand, Anton Tadich and James R Hester
335402
Impact of the volume change on the ageing effects in Cu–Al–Ni martensite: experiment and theory Anna Kosogor, Dezhen Xue, Yumei Zhou, Xiangdong Ding, Kazuhiro Otsuka, Victor A L’vov, Jun Sun and Xiaobing Ren
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Stability, elastic properties and fracture toughness of Al0.75 X0.75 B14 (X=Sc, Ti, V, Cr, Y, Zr, Nb, Mo) investigated using ab initio calculations Jens Emmerlich, Niklas Thieme, Moritz to Baben, Denis Music and Jochen M Schneider
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Oxygen deficient centers in silica: optical properties within many-body perturbation theory N Richard, L Martin-Samos, S Girard, A Ruini, A Boukenter, Y Ouerdane and J-P Meunier
335503
Topological phase transition induced by spin–orbit coupling in bilayer graphene Lei Xu, Yuan Zhou and Chang-De Gong
SOLID STRUCTURE AND LATTICE DYNAMICS
Vol 25, No 33 331001–339602
NANOSTRUCTURES AND NANOELECTRONICS
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Volume 25 Number 33 21 August 2013 Topical Review Advances in first-principles modelling of point defects in UO 2: f electron correlations and the issue of local energy minima B Dorado, M Freyss, B Amadon, M Bertolus, G Jomard and P Garcia
ELECTRONIC STRUCTURE
Typical SEM images of precipitated supracrystals made of (a) 5 nm, (b) 6 nm, (c) 7 nm and (d) 8 nm nanocrystals. CORRELATED ELECTRONS
335601
The k-space origins of scattering in Bi2 Sr2 CaCu2 O8+x Jacob W Alldredge, Eduardo M Calleja, Jixia Dai, H Eisaki, S Uchida and Kyle McElroy
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Magnons as pseudo-Goldstones in La-based cuprates: the effects of doping M Fidrysiak and P Rusek
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Enhancement of phase separation and superconductivity in Mn-doped K0.8 Fe2−y Mny Se2 crystals M T Li, L Chen, Z W Li, G H Ryu, C T Lin and J C Zhang
335702
Superconducting anisotropy in (CaCuO2 )n /(SrTiO3 )m superlattices M Salvato, I Ottaviani, M Lucci, M Cirillo, D Di Castro, D Innocenti, A Tebano and G Balestrino
SUPERCONDUCTORS AND METALS
References
Normalized dI/dV curves of thin, i n t e r f a c i a l a n d p r e c i p i t a t e d s u p r a c r y s t a l s m a d e o f 7 n m nanocrystals at (a) 78 K and (b) 5 K.
Bibliographic codes CODEN: JCOMEL 25 (33) 331001–339602 (2013) ISSN: 0953-8984
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P. Yang, I. Arfaoui, T. Cren, N. Goubet, and M.P. Pileni, Supracrystals of Au-‐nanocrystals differing by their diameters: Influence of the Thickness and Nanocrystallinity on the Electronic Proper,es, J. Phys.: Condens. Maaer, 2013, 25 (33), 335302 (Cover page) P. Yang, I. Arfaoui, T. Cren, N. Goubet, and M.P. Pileni, Electronic proper,es probed by scanning tunneling spec-‐ troscopy: From isolated Au nanocrystal to well-‐defined supracrystals, Phys. Rev. B, 2012, 86 (7), 075409 P. Yang, I. Arfaoui, T. Cren, N. Goubet, and M.P. Pileni, Unexpected Electronic Proper,es of Micrometer Thick Well-‐ defined Supracrystal of Au Nanocrystals, Nano Lea. 2012, 12 (4), 2051-‐2055