Accession Number:

ADA626929

Title:

Exploring Novel Spintronic Responses from Advanced Functional Organic Materials

Descriptive Note:

Final rept. 14 Jun 2012-13 Jun 2015

Corporate Author:

SEOUL NATIONAL UNIV (REPUBLIC OF KOREA)

Personal Author(s):

Report Date:

2015-08-10

Pagination or Media Count:

30.0

Abstract:

In this project, we investigated magnetic property of pi-conjugated molecules and application of spin-radical containing molecule. This report has three parts. First, we will report the results of organic magnetoresistance OMAR in field effect transistors. We observed OMAR in ambipolar field effect transistors based on Hex-4-TFPTA. Underlying mechanism of OMAR was tuned by changing source-drain voltage from positive 100 V to negative - 100 V at fixed gate voltage 100V. The maximum MR values were 3 and 0.4 at 100 mT, respectively. We conclude that dominant OMAR mechanism can be changed by injecting minority charge carriers. Second, we will report on the spin-radical containing fluorescent organic molecule for ascorbic acid AA sensor. A novel nitronylnitroxide derivative NN-CN-TFFP for highly sensitive and selective detection of AA operating over broad concentration range from 1 micron to 2 mM is reported. The probe showed 260-fold fluorescence turn-on and diminished electron spin resonance ESR signal upon AA addition. Finally, we will briefly report the result of collaboration work with Prof. Bin Hu group has characterized optically tunable Seebeck effect from the intramolecular proton-transfer materials originally synthesized in our group.

Subject Categories:

  • Organic Chemistry
  • Magnetic and Electric Field Detection and Detectors
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE