Sintered aerosol masks for dry-etched quantum dots

Deppert, Knut; Maximov, Ivan; Samuelson, Lars; Hansson, Hans‐Christen; Weidensohler, Alfred

doi:10.1063/1.111314

Cited by 30 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The aerosol generator set up, which is described in detail elsewhere, 11 consists of a furnace tube with an Ag containing ceramic boat. This first furnace for the aerosol generation was kept at a temperature of 1240°C, resulting in a sufficiently high number of particles with diameters below 100 nm.…”

Section: Methodsmentioning

confidence: 99%

Electron transport at Au/InP interface with nanoscopic exclusions

Anand

Carlsson

Deppert

et al. 1996

Journal of Vacuum Science &Amp; Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

View full text Add to dashboard Cite

We present an investigation of electron transport at the Au/InP metal semiconductor ͑MS͒ interface in the presence of nanoscopic barrier inhomogeneities. In particular, we focus on the transport regime wherein the low barrier inhomogeneous regions are pinched off by the depletion potential of the surrounding higher barrier region. To realize this, we have fabricated a composite MS structure comprising of a known density of nanometer sized Ag aerosol particles on InP overlayed by a uniform Au film. Temperature dependent current-voltage ͑I -V͒ measurements were performed to characterize the electron transport at the composite MS interface. The experimental observations are explained using a simple model for the MS junction current in which the Ag/InP regions are assumed to be identical and noninteracting. Our results clearly demonstrate that the electron transport at the MS interface is significantly affected by low barrier regions even in the pinch-off regime. In addition, the influence of the particle density and the Ag/InP barrier heights on the diode characteristics is also investigated. It is suggested that Schottky barrier inhomogeneities could be the main source of the usually observed larger-than-unity ideality factors in diodes. Furthermore, our results indicate possibilities of using such composites to explore the physics and applications of nanoinjecting contacts.

show abstract

Section: Methodsmentioning

confidence: 99%

Electron transport at Au/InP interface with nanoscopic exclusions

Anand

Carlsson

Deppert

et al. 1996

Journal of Vacuum Science &Amp; Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

View full text Add to dashboard Cite

show abstract

“…For example, Deppert et al. ( 1994 ) deposited spherical silver particles on a semiconductor to serve as etch masks for quantum-dot structures and Kang et al. ( 2004 ) prepared patterns consisting of silver nanoparticles for electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Size-controlled aerosol synthesis of silver nanoparticles for plasmonic materials

et al. 2012

View full text Add to dashboard Cite

Aerosol techniques were used to synthesize spherical and monodisperse silver nanoparticles for plasmonic materials. The particles were generated with an evaporation–condensation technique followed by size selection and sintering with a differential mobility analyzer and a tube furnace, respectively. Finally, the nanoparticles were collected on a glass substrate with an electrostatic precipitator. The particle size distributions were measured with a scanning mobility particle sizer and verified with a transmission electron microscope. A spectrophotometer was used to measure the optical extinction spectra of the prepared samples, which contained particles with diameters of approximately 50, 90 and 130 nm. By controlling the particle size, the dipolar peak of the localized surface plasmon resonance was tuned between wavelengths of 398 and 448 nm. In addition, quadrupolar resonances were observed at shorter wavelengths as predicted by the simplified theoretical model used to characterize the measured spectra.

show abstract

“…Previously, supported metal particles have been obtained by a wide variety of techniques including electric-field-assisted deposition of metal aerosols, , vacuum evaporation of metals, − diffusion-controlled aggregation, inert gas evaporation, e-beam and X-ray nanolithography, − accumulation of colloidal metal particles from solution onto a charged support, , and chemical and electrochemical deposition of metals into nanoscopic templates. − …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition of Silver Nanocrystallites on the Atomically Smooth Graphite Basal Plane

et al. 1996

View full text Add to dashboard Cite

A potentiostatic pulse method has been employed to electrochemically deposit silver nanocrystallites on the atomically smooth graphite basal plane surface. Voltage pulses having amplitudes of 100, 250, and 500 mV vs Ag0 and durations of 10 or 50 ms were applied to graphite surfaces immersed in dilute (≈1.0 mM) aqueous silver nitrate. During the deposition pulse, the current increased in approximate proportion to (time)1/2 as expected for an instantaneous nucleation and three-dimensional growth mode of deposition. Consistent with this growth mode, noncontact atomic force microscopy (NC-AFM) examination of graphite surfaces following silver deposition revealed the existence of silver particles at a coverage of near 1010 cm-2 which were well-separated from one another on atomically smooth regions of the graphite basal plane surface. These particles were disk-shaped having a height of 15−50 Å and an apparent diameter which varied from 200 to 600 Å; particle dimensions increased smoothly with the coulometric loading, Q Ag, over the interval from 0.31 to 36 μC cm-2 and in approximate proportion to Q Ag 1/3. Significantly, silver nanocrystallites present on the atomically smooth regions of a graphite surface could not be observed by using either the scanning tunneling microscope (STM) or a conventional repulsive mode atomic force microscope (AFM). In addition to NC-AFM, the characterization of these silver nanocrystallites by transmission electron microscopy lattice imaging and Auger electron spectroscopy is reported.

show abstract

Sintered aerosol masks for dry-etched quantum dots

Cited by 30 publications

References 4 publications

Electron transport at Au/InP interface with nanoscopic exclusions

Electron transport at Au/InP interface with nanoscopic exclusions

Size-controlled aerosol synthesis of silver nanoparticles for plasmonic materials

Electrochemical Deposition of Silver Nanocrystallites on the Atomically Smooth Graphite Basal Plane

Contact Info

Product

Resources

About