Journal Article

PreJuSER-11896

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Low-Frequency Noise in Field-Effect Devices Functionalized With Dendrimer/Carbon-Nanotube Multilayers

Gasparyan, F. V. ; Poghossian, A.FZJ* ; Vitusevich, S. A.FZJ* ; Petrychuk, M. V. ; Sydoruk, V. A.FZJ* ; Siqueira, J. R. J. ; Oliveira, O. N. J. ; Offenhäusser, A.FZJ* ; Schöning, M. J.FZJ*

2011
IEEE New York, NY

This record in other databases:    

Please use a persistent id in citations: doi:10.1109/JSEN.2010.2052355

Abstract: Low-frequency noise in an electrolyte-insulator- semiconductor (EIS) structure functionalized with multilayers of polyamidoamine (PAMAM) dendrimer and single-walled carbon nanotubes (SWNT) is studied. The noise spectral density exhibits 1/f(gamma) dependence with the power factor of gamma approximate to 0.8 and gamma = 0.8-1.8 for the bare and functionalized EIS sensor, respectively. The gate-voltage noise spectral density is practically independent of the pH value of the solution and increases with increasing gate voltage or gate-leakage current. It has been revealed that functionalization of an EIS structure with a PAMAM/SWNTs multilayer leads to an essential reduction of the 1/f noise. To interpret the noise behavior in bare and functionalized EIS devices, a gate-current noise model for capacitive EIS structures based on an equivalent flatband-voltage fluctuation concept has been developed.

Keyword(s): J ; Carbon nanotube (auto) ; dendrimer (auto) ; field-effect sensor (auto) ; low-frequency noise (auto)

Note: Manuscript received February 24, 2010; revised May 18, 2010; accepted May 20, 2010. Date of publication September 20, 2010; date of current version November 03, 2010. This work was supported by CAPES, Brazil. The work of F. V. Gasparyan was supported by German Academic Exchange Service (DAAD). The associate editor coordinating the review of this manuscript and approving it for publication was Prof. Evgeny Katz.

---

Contributing Institute(s):

1. Bioelektronik (ICS-8)
2. Bioelektronik (PGI-8)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)
2. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)

Appears in the scientific report 2011

---