A dual analyzer for real-time impedance and noise spectroscopy of nanoscale devices

Min Kyu Joo, Pilsoo Kang, Yongha Kim, Gyu-Tae Kim, Sangtae Kim

Research output: Contribution to journalArticle

21 Citations (Scopus)


This paper introduces a simple portable dual analyzer which allows real-time ac-impedance measurements and noise spectroscopic analysis simultaneously, employing one or two data acquisition systems together with a low noise current-to-voltage preamplifier. The input signal composed of numerous selected frequencies of sinusoidal voltages with a dc bias was applied to a device under the test (DUT): single walled carbon nanotube field effect transistors (SWCNT-FETs). Each frequency component, ranging from 1 to 46.4 kHz, was successfully mapped to a Nyquist plot using the background of the electrical noise power spectrum. It is, thus, clearly demonstrated that this dual analyzer enables the real-time ac-impedance analysis and the frequency response of the carrier transport in the SWCNT-FETs as a DUT.

Original languageEnglish
Article number034702
JournalReview of Scientific Instruments
Issue number3
Publication statusPublished - 2011 Mar 1


ASJC Scopus subject areas

  • Instrumentation
  • Medicine(all)

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