Title :
Quantum Tunnelling Demonstration using a Low-cost Experimental Setup
Author :
Gonzalez, Camila A. ; Ruiz, J.P. ; Bonilla, Ruy S. ; Avila, A.G.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. de Los Andes, Bogota, Colombia
Abstract :
A simple and reliable experimental setup that illustrates one-dimensional quantum tunnelling effect is introduced. The main elements in this setup are the fabrication of sharp tips, and the sensing and approaching mechanism. A technique to fabricate very sharp tips is described, with tips made of 60 μm thick tungsten wire easily obtainable from car light bulbs. The technique produced tips with aspect ratios of 2 and tip diameter of 15 nm ±4.5 nm. A mechanical configuration to scale down semi-lineal displacement is suggested along with an experimental setup, including circuitry and measurement.
Keywords :
nanosensors; physics education; quantum theory; scanning probe microscopy; student experiments; tungsten; tunnelling; W; approaching mechanism; aspect ratios; car light bulbs; low-cost experimental setup; mechanical configuration; one-dimensional quantum tunnelling effect; quantum tunnelling demonstration; scanning probe microscopes; semilineal displacement; sensing mechanism; sharp tips fabrication; size 60 mum; tip diameter; tungsten wire; Etching; Microscopy; Resonant tunneling devices; Tungsten; Wires; Microscopy; Tunneling effect; education; nanotechnology; physics; piezoelectric discs; piezoelectric transducers; tungsten tip;
Conference_Titel :
Micro-Nanoelectronics, Technology and Applications (EAMTA), 2013 7th Argentine School of
Conference_Location :
Buenos Aires
