Quantitative high-resolution microscopy on a suspended chain of gold atoms

Koizumi, Hiroaki; Oshima, Yoshifumi; Kondo, Yumi; Takayanagi, Kunio

doi:10.1016/s0304-3991(00)00129-7

Cited by 46 publications

(44 citation statements)

References 15 publications

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“…It has been reported [3,4,5,14,20] that interatomic distances frequently vary in the 2.9 -3.6Å range and also, extremely long distances close to 5Å have been rarely observed [15]. The origin of these large distances has been a serious and unresolved challenge for theoretical interpretation.…”

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confidence: 99%

“…Neither of these theoretical works have considered the possibility of the monoatomic chains being contaminated by some impurities [4,5,14,15] during sample fabrication. We have decided to explore this possibility, in special considering carbon atom contamination that, from experimental conditions, are most likely spurious atoms during HRTEM observations [5,14].…”

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“…FAX:+55-19-37885376. Electronic address:slegoas@ifi.unicamp.br and would appear as large unusual Au-Au distances [15].…”

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Origin of Anomalously Long Interatomic Distances in Suspended Gold Chains

et al. 2002

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The discovery of long bonds in gold atom chains has represented a challenge for physical interpretation. In fact, interatomic distances frequently attain 3.0-3.6Å values and, distances as large as 5.0 A may be seldom observed. Here, we studied gold chains by transmission electron microscopy and performed theoretical calculations using cluster ab initio density functional formalism. We show that the insertion of two carbon atoms is required to account for the longest bonds, while distances above 3Å may be due to a mixture of clean and one C atom contaminated bonds.

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Origin of Anomalously Long Interatomic Distances in Suspended Gold Chains

et al. 2002

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“…Although gold has been the most prominent metal studied so far, mechanical elongation has shown to be useful to fabricate nanowires of Ag , Co, Pt (Rodrigues et al, 2003), Pd Rodrigues et al, 2003) and Cu (Bettini et al, 2006), as well as for Au and Ag alloys of varying compositions (Sato et al, 2006b). Two striking experimental features have drawn the attention of the researches in the last few years: first, the existence of unusually large Au -Au distances in the order of 3.6 -4.0 Å (Kizuka, 2008;Koizumi et al, 2001;Ohnishi et al, 1998;Sato et al, 2006b), longer than the bulk distance of 2.88 Å. These experimental observations along with the simulation of HRTEM measurements suggest that the atomic-sized wires are complexed with light elements (such as H, C, S for example) (Kizuka, 2008;Koizumi et al, 2001).…”

Section: Experimental Measurementsmentioning

confidence: 99%

“…Two striking experimental features have drawn the attention of the researches in the last few years: first, the existence of unusually large Au -Au distances in the order of 3.6 -4.0 Å (Kizuka, 2008;Koizumi et al, 2001;Ohnishi et al, 1998;Sato et al, 2006b), longer than the bulk distance of 2.88 Å. These experimental observations along with the simulation of HRTEM measurements suggest that the atomic-sized wires are complexed with light elements (such as H, C, S for example) (Kizuka, 2008;Koizumi et al, 2001). Second, the long-term stability of gold nanowires at room temperature, in many cases in the order of seconds (Legoas et al, 2002;Ohnishi et al, 1998;Rodrigues & Ugarte, 2001a;RubioBollinger et al, 2001;Takai et al, 2001;Yanson et al, 1998), which is an extremely long time in relation to those characteristic of molecular motion.…”

Section: Experimental Measurementsmentioning

confidence: 99%