Characteristic Length Scale of Nanorod Diameter during Growth

Zhou, L.; Huang, Hanchen

doi:10.1103/physrevlett.101.266102

Cited by 22 publications

(27 citation statements)

References 17 publications

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“…As shown in Fig. 3(a), the large-porosity film develops into nanorods of very small diameter, on the order of 30 nm, that is comparable to the minimum diameter of Cu nanorods [13]. From the uniform film of Fig.…”

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confidence: 88%

Anomaly of film porosity dependence on deposition rate

Stagon

Huang

Baldwin

et al. 2012

Applied Physics Letters

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This Letter reports an anomaly of film porosity dependence on deposition rate during physical vapor deposition -the porosity increases as deposition rate decreases. Using glancing angle deposition of Cu on SiO 2 substrate, the authors show that the Cu film consists of well separated nanorods when the deposition rate is 1 nm/second, and that the Cu films consists of a more uniform (or lower porosity) film when the deposition rate is 6 nm/second; all other deposition conditions remain the same. This anomaly is the result of interplay among substrate non-wetting, density of Cu nuclei on the substrate, and the minimum diameter of nanorods.

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confidence: 88%

Anomaly of film porosity dependence on deposition rate

Stagon

Huang

Baldwin

et al. 2012

Applied Physics Letters

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“…Nanorods come about from mode I through the dominance of geometric shadowing and intrinsic surface roughness. The competition of monolayer and multiple-layer surface steps, that is, nanorods have both monolayer and multiple layer surface steps, leads to the diameter of the resulting nanorods stabilizing around 100 nm [41] . Of particular technological interest is nanorod growth in mode II.…”

Section: Fabrication Of Small Nanorods Using Pvdmentioning

confidence: 99%

Syntheses and applications of small metallic nanorods from solution and physical vapor deposition

Stagon

Huang

2013

Nanotechnology Reviews

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Metallic nanorods have a wide range of important technological applications. Fabrication of metallic nanorods of ∼ 100 nm using physical vapor deposition (PVD) has been commonplace for several decades. On this length scale, nanorods have similar functionalities to bulk thin films with the advantage of increased surface area. When the lateral dimension is decreased to ∼ 10 nm new functionalities emerge that are not present in thin film counterparts, such as catalysis. Small metallic nanorods, those ∼ 10 nm, have classically been made through solution-based synthesis. Alternatively, recent advances in scientific understanding, a framework of nanorod growth, have opened the door to the fabrication of small nanorods through PVD. Growing small nanorods through PVD offers technologically relevant advantages over solutionbased processing like direct control of aspect ratio, pure high-vacuum processing, and oriented attachment to a substrate. Among materials, gold (Au) has a wide range of technological applications and is a good prototype for understanding the behavior of common face center cubic metals. This article reviews solution processing and PVD of small metallic nanorods using Au as a prototype, in terms of scientific understanding and fabrication knowledge, and further compares and contrasts the two approaches.

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“…Specifically, we have determined the three-dimensional Ehrlich-Schwoebel barriers, with and without surfactants [1, 2, and two manuscripts in preparation]; references refer to the list of journal publications. Further, we have discovered a characteristic length scale -the dimension of atomic islands bounded by multiple-layer surface steps [3]. This discovery has made it possible to understand scientifically why nanorods synthesis is possible at all, will enable science-based design of nanorods, and may impact energy technology through nanomaterials design and synthesis.…”

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confidence: 93%

Control of New Kinetic Barriers & Design of Nanorods

Huang¹

2012

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Brief description of accomplishments:Overall, the accomplishments include three elements.The first element directly relates to the focus of this project. Specifically, we have determined the three-dimensional Ehrlich-Schwoebel barriers, with and without surfactants [1, 2, and two manuscripts in preparation]; references refer to the list of journal publications. Further, we have discovered a characteristic length scale -the dimension of atomic islands bounded by multiple-layer surface steps [3]. This discovery has made it possible to understand scientifically why nanorods synthesis is possible at all, will enable science-based design of nanorods, and may impact energy technology through nanomaterials design and synthesis.

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Characteristic Length Scale of Nanorod Diameter during Growth

Cited by 22 publications

References 17 publications

Anomaly of film porosity dependence on deposition rate

Anomaly of film porosity dependence on deposition rate

Syntheses and applications of small metallic nanorods from solution and physical vapor deposition

Control of New Kinetic Barriers & Design of Nanorods

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