Blog

2
May

New Publication: “Resonant Tunneling Induced Enhancement of Electron Field Emission by Ultra-Thin Coatings” in Scientific Reports

Our new publication “Resonant Tunneling Induced Enhancement of Electron Field Emission by Ultra-Thin Coatings” has been published today in Scientific Reports.

Abstract: The emission of electrons from the surface of a material into vacuum depends strongly on the material’s work function, temperature, and the intensity of electric field. The combined effects of these give rise to a multitude of related phenomena, including Fowler-Nordheim tunneling and Schottky emission, which, in turn, enable several families of devices, ranging from vacuum tubes, to Schottky diodes, and thermionic energy converters. More recently, nanomembrane-based detectors have found applications in high-resolution mass spectrometry measurements in proteomics. Progress in all the aforementioned applications critically depends on discovering materials with effective low surface work functions. We show that a few atomic layer deposition (ALD) cycles of zinc oxide onto suspended diamond nanomembranes, strongly reduces the threshold voltage for the onset of electron field emission which is captured by resonant tunneling from the ZnO layer. Solving the Schroedinger equation, we obtain an electrical field- and thickness-dependent population of the lowest few subbands in the thin ZnO layer, which results in a minimum in the threshold voltage at a thickness of 1.08 nm being in agreement with the experimentally determined value. We conclude that resonant tunneling enables cost-effective ALD coatings that lower the effective work function and enhance field emission from the device.

20
Apr

Successful Participtaion at BMBF Call “ForLab”

Together with Prof. Hoc Khiem Trieu (TUHH)  and Prof. Wolfgang Hansen (CHyN, UHH) we successfully participated at the BMBF Call “Forschungslabore Mikroelektronik Deutschland (ForLab)”.

The delivery of two E-Beam Raith Voyager-AddOns and a new EVG wafer bonder are already scheduled for May. Our new III-V-ICP-RIE by SENTECH is going to be installed before summer.

18
Apr

Nano-Bio-Electronics Seminar 24.04.2019 1:15 pm

18
Apr

Press Release for our new publication: Microscaffolds by Direct Laser Writing for Neurite Guidance Leading to Tailor-Made Neuronal Networks

Press Release by the University of Greifswald
Press Release by the MIN Faculty (UHH)
Microscaffolds by Direct Laser Writing for Neurite Guidance Leading to Tailor-Made Neuronal Networks

by

Fendler, Cornelius; Denker, Christian; Harberts, Jann; Bayat, Parisa; Zierold, Robert; Loers, Gabriele; Münzenberg, Markus; Blick, Robert H

in

Advanced Biosystems.

18
Apr

Congratulations and a Warm Welcome to Prof. Gerhard Klimeck

Prof. Gerhard Klimeck received the prestigious Humboldt Research Award and will intensively collaborate with our group.

24
Mar

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9
Jan

Advanced Solid State Physics

(UHH-66-304+305)

Winter Terms

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9
Jan

Nano-Bio-Electronics (UHH-66-518)

Every Term

Tuesdays 13.15h

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19
Dec

Colloquium @ CFEL 2pm

Every Term

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