Revealing thermal effects in the electronic transport through irradiated atomic metal point contacts

Kopp, Bastian; Yi, Zhiwei; Benner, Daniel; Xie, Fangqing; Obermair, Christian; Schimmel, Thomas; Boneberg, Johannes; Leiderer, Paul; Scheer, Elke

doi:10.3762/bjnano.3.80

Cited by 8 publications

(13 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this way oxygen-induced acceptor states are formed near the valence band (such as oxygen interstitials and indium vacancies) and the number of states increases with increasing oxygen flow. A poor crystalline quality with abundant structural defects leads to effective compensation of doping [33,48].…”

Section: Resultsmentioning

confidence: 99%

Rapid thermal annealing for high-quality ITO thin films deposited by radio-frequency magnetron sputtering

Prepelita¹,

Stavarache²,

Crǎciun³

et al. 2019

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

In this work, rapid thermal annealing (RTA) was applied to indium tin oxide (ITO) films in ambient atmosphere, resulting in significant improvements of the quality of the ITO films that are commonly used as conductive transparent electrodes for photovoltaic structures. Starting from a single sintered target (purity 99.95%), ITO thin films of predefined thickness (230 nm, 300 nm and 370 nm) were deposited at room temperature by radio-frequency magnetron sputtering (rfMS). After deposition, the films were subjected to a RTA process at 575 °C (heating rate 20 °C/s), maintained at this temperature for 10 minutes, then cooled down to room temperature at a rate of 20 °C/s. The film structure was modified by changing the deposition thickness or the RTA process. X-ray diffraction investigations revealed a cubic nanocrystalline structure for the as-deposited ITO films. After RTA, polycrystalline compounds with a textured (222) plane were observed. X-ray photon spectroscopy was used to confirm the beneficial effect of the RTA treatment on the ITO chemical composition. Using a Tauc plot, values of the optical band gap ranging from 3.17 to 3.67 eV were estimated. These values depend on the heat treatment and the thickness of the sample. Highly conductive indium tin oxide thin films (ρ = 7.4 × 10−5 Ω cm) were obtained after RTA treatment in an open atmosphere. Such films could be used to manufacture transparent contact electrodes for solar cells.

show abstract

Section: Resultsmentioning

confidence: 99%

Rapid thermal annealing for high-quality ITO thin films deposited by radio-frequency magnetron sputtering

Prepelita¹,

Stavarache²,

Crǎciun³

et al. 2019

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…Plasmonic particles heated by laser pulses have been discussed to be used as "nanostoves" for biological tissue in biosensors or for cancer thermotherapy [44–45]. They may also lend themselves as sources of local heat gradients in nano thermoelectronic devices [46]. In addition to the spherical particles described in literature, the selective heating of single tips of the plasmonic triangle would make it possible to compare heating effects under otherwise identical conditions on a very small scale.…”

Section: Resultsmentioning

confidence: 99%

Mapping of plasmonic resonances in nanotriangles

Dickreuter¹,

Gleixner²,

Kolloch³

et al. 2013

Beilstein J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

SummaryPlasmonic resonances in metallic nano-triangles have been investigated by irradiating these structures with short laser pulses and imaging the resulting ablation and melting patterns. The triangular gold structures were prepared on Si substrates and had a thickness of 40 nm and a side length of ca. 500 nm. Irradiation was carried out with single femtosecond and picosecond laser pulses at a wavelength of 800 nm, which excited higher order plasmon modes in these triangles. The ablation distribution as well as the local melting of small parts of the nanostructures reflect the regions of large near-field enhancement. The observed patterns are reproduced in great detail by FDTD simulations with a 3-dimensional model, provided that the calculations are not based on idealized, but on realistic structures. In this realistic model, details like the exact shape of the triangle edges and the dielectric environment of the structures are taken into account. The experimental numbers found for the field enhancement are typically somewhat smaller than the calculated ones. The results demonstrate the caveats for FDTD simulations and the potential and the limitations of “near field photography” by local ablation and melting for the mapping of complex plasmon fields and their applications.

show abstract

“…The photothermal excitation of an electrically contacted metal nanowire resting on the glass surface is usually considered negligible. While the macroscopic electrodes connected to the nanowire act as heat sinks and the physical contact to the substrate contributes to an efficient cooling of the nanowire by thermal conduction [37], we determine a maximum temperature significantly exceeding the average temperature inferred from a global calibration of the temperature-dependent resistivity of the nanowire [5,6,25]. Interestingly, we demonstrate that the rise of temperature for a direct optical excitation of the nanowire is weaker than for a laterally displaced isolated resonant nanoparticle.…”

Section: Long Range Heat Transfermentioning

confidence: 99%

Remote plasmon-induced heat transfer probed by the electronic transport of a gold nanowire

et al. 2016

View full text Add to dashboard Cite

We show in this paper that the heat generated by the optical excitation of resonant plasmonic antennas and diffusing along a simple glass/air interface disturbs the electron transport of a nearby conductive element. By probing the temperature-dependent resistance of a gold nanowire R nw (T ), we quantitatively analyze the impact of a resonant absorption of the laser by the antennas. We find that the temperature rise at the nanowire induced by the laser absorption of a distant nanoparticle may exceed that of a direct illumination of the nanowire itself. We also find that a global temperature calibration underestimates the heat generated locally by the laser. The temperature deduced from resistance variations are verified by numerical simulations with a very satisfactory agreement.

show abstract

Revealing thermal effects in the electronic transport through irradiated atomic metal point contacts

Cited by 8 publications

References 24 publications

Rapid thermal annealing for high-quality ITO thin films deposited by radio-frequency magnetron sputtering

Rapid thermal annealing for high-quality ITO thin films deposited by radio-frequency magnetron sputtering

Mapping of plasmonic resonances in nanotriangles

Remote plasmon-induced heat transfer probed by the electronic transport of a gold nanowire

Contact Info

Product

Resources

About