Role of surface states on the sensing properties of In0.5Ga0.5As surface quantum dots

Milla Rodrigo, María José and Hernández, I. and Méndez, J. and García, J.M. and Fernández González, Alvaro de Guzmán (2015). Role of surface states on the sensing properties of In0.5Ga0.5As surface quantum dots. In: "18th European Molecular Beam Epitaxy workshop", 15/03/2016 - 18/03/2015, Canazei, Italy.

Description

Title: Role of surface states on the sensing properties of In0.5Ga0.5As surface quantum dots
Author/s:
  • Milla Rodrigo, María José
  • Hernández, I.
  • Méndez, J.
  • García, J.M.
  • Fernández González, Alvaro de Guzmán
Item Type: Presentation at Congress or Conference (Article)
Event Title: 18th European Molecular Beam Epitaxy workshop
Event Dates: 15/03/2016 - 18/03/2015
Event Location: Canazei, Italy
Title of Book: 18th European Molecular Beam Epitaxy workshop
Date: 2015
Subjects:
Faculty: Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM) (UPM)
Department: Ingeniería Electrónica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Self-assembled uncapped III-V semiconductor quantum dots (QD) have recently emerged as good candidates to develop sensor devices due to their exceptional sensitivity to changes in the surrounding environment. Previous studies report that the external ambient conditions greatly influence the optical and electrical properties of In0.5Ga0.5As surface QD (SQD)2. Furthermore, it was found different electrical response depending on the two- or threedimensional nature of the surface. Surface quantum well (SQW) conductivity suffers a negligible variation when changing the external atmosphere, whereas SQDs conductivity shows a significant increment3 Surface states are generally proposed to be responsible for such effect, although this is still under discussion. In the case of the SQDs, this effect is enhanced by the high surface to volume ratio compared to SQWs.

More information

Item ID: 41986
DC Identifier: http://oa.upm.es/41986/
OAI Identifier: oai:oa.upm.es:41986
Deposited by: Memoria Investigacion
Deposited on: 07 Sep 2016 17:42
Last Modified: 07 Sep 2016 17:42
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