Template synthesis and forming electrical contacts to single Au nanowires by focused ion beam techniques

Valizadeh, Sima; Abid, Mohamed; Hernández-Ramírez, Francisco; Rodríguez, Albert; Hjort, Klas; Schweitz, Jan‐Åke

doi:10.1088/0957-4484/17/4/048

Cited by 42 publications

(34 citation statements)

References 23 publications

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“…With growth of nanowires, electrodeposited gold fills the pores and then begins to emerge from them until coverage on the surface takes place. In this case, the total current density increases because the surface area for growth of the deposits is increased [14]. As it is obvious, by increasing overpotential, gold nanowires fill the pores faster, so the filling time decreases.…”

Section: Solutionmentioning

confidence: 96%

“…Then, due to the spherical diffusion around the protrusions a cauliflower growth can be observed which leads to formation of caps on the surface. In the final stage, a complete coverage of caps occurs on the surface [14][15][16][17][18]. In Fig.…”

Section: Solutionmentioning

confidence: 99%

“…One of the most versatile and inexpensive techniques is the template method, in which the pores of a host membrane are filled with certain materials [12,13]. By using template method properties like shape, size and composition of nanowires can be controlled easily, also a high aspect ratio (length to width ratio) can be achieved [14,15]. The electrochemical deposition [16] in etched-ion-track polycarbonate membranes [17] facilitates the control of deposition parameters such as temperature, applied voltage and current density and provides the highest flexibility [8] in comparison with other techniques.…”

Section: Introductionmentioning

confidence: 99%

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A study on the kinetics of gold nanowire electrodeposition in polycarbonate templates

Soleimany

Dolati

Ghorbani

2010

Journal of Electroanalytical Chemistry

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Section: Solutionmentioning

confidence: 96%

Section: Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A study on the kinetics of gold nanowire electrodeposition in polycarbonate templates

Soleimany

Dolati

Ghorbani

2010

Journal of Electroanalytical Chemistry

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“…[5][6][7] Estimation of electrical parameters of individual 1D nanowires ͑NWs͒ using FIB-assisted nanolithography has been demonstrated in recent reports. [8][9][10] Nevertheless, the formation of Schottky barriers at the metal-NW interfaces, when semiconductor materials are contacted, complicates the nanodevice characterization due to non-Ohmic electrical responses and high contact resistances. 11,12 We have investigated an effective alternative to using conventional field-effect transistor ͑FET͒ geometries, which have been used to determine key parameters of SnO 2 NWs in the past.…”

Section: Introductionmentioning

confidence: 99%

Electrical properties of individual tin oxide nanowires contacted to platinum electrodes

et al. 2007

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A simple and useful experimental alternative to field-effect transistors for measuring electrical properties ͑free electron concentration n d , electrical mobility , and conductivity ͒ in individual nanowires has been developed. A combined model involving thermionic emission and tunneling through interface states is proposed to describe the electrical conduction through the platinum-nanowire contacts, fabricated by focused ion beam techniques. Current-voltage ͑I-V͒ plots of single nanowires measured in both two-and four-probe configurations revealed high contact resistances and rectifying characteristics. The observed electrical behavior was modeled using an equivalent circuit constituted by a resistance placed between two back-to-back Schottky barriers, arising from the metal-semiconductor-metal ͑M-S-M͒ junctions. Temperature-dependent I-V measurements revealed effective Schottky barrier heights up to ⌽ BE = 0.4 eV.

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“…This value was found to be higher than that of bulk Au (2.8 · 10 -6 OÁcm) at room temperature. The relatively high value can be related to the nanowire wall roughness (see Figure 4.13), which in turn results in an increased electron scattering at the grain boundaries of the nanowire [90][91][92][93].…”

Section: Electrical Transport Measurements On Single Nanowires Using mentioning

confidence: 99%

Template Synthesis of Magnetic Nanowire Arrays

Valizadeh

Strömberg

Strömme

2008

Nanostructured Materials in Electrochemistry

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IntroductionDuring the late 20th century, the growing interest in creating advanced materials using nanoscaled building blocks was employed to develop synthetic techniques for re-engineering existing materials to novel functional materials such as quantum dots, nanodots, nanorods, nanotubes, nanofibrils and quantum wires. These nanowires can act as one-dimensional conductors with interesting electronic and optical properties. Moreover, nanowires may find applications in ultrasensitive chemical and biological sensors.To date, a physical vapor deposition (PVD) technique followed by lithography is usually considered to represent the ultimate method for producing nanoscaled materials. Although a number of successful efforts have been reported on the fabrication of freestanding nanopillars or nanowells using lithographic techniques, there is a whole range of potential obstacles for these approaches. These arise mainly from the fact that, when the technologies are pushed to smaller sizes, the cost rapidly escalate and the tolerances are more difficult to maintain. The lithographic processes used to pattern nanoelectronic structures also currently limit the dimensions of the electronic components such as nanowires. Optical lithography is limited by the wavelength of the light used to produce the wires. Consequently, the wavelength of light used is moving into the deeper regions of the ultraviolet (UV) spectrum, and the cost of fabricating optical components to achieve this is expected to rise at an astronomic rate. These challenges have forced many to seek new nanofabrication techniques, especially those which grow nanostructures directly in the openings of a template. One of the most successful approaches to these nanofabrication methods is known as the membrane-based synthesis of nanomaterials [1][2][3][4], where the membrane acts as a template for the electrodeposition of multilayered nanowires, as well as for single metallic nanowires [5,6]. The advantage of using template synthesis of nanowires is that it can be considered as an alternative solution to overcome the difficulty in fabricating fibrils with very small diameters by lithographic methods [7].

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Template synthesis and forming electrical contacts to single Au nanowires by focused ion beam techniques

Cited by 42 publications

References 23 publications

A study on the kinetics of gold nanowire electrodeposition in polycarbonate templates

A study on the kinetics of gold nanowire electrodeposition in polycarbonate templates

Electrical properties of individual tin oxide nanowires contacted to platinum electrodes

Template Synthesis of Magnetic Nanowire Arrays

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