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▲ [14a-E206-1] Electronic Properties of Small Au Nanoparticle Island in Single-Electron Device
キーワード：singe-electron transistor, gold nanoparticle, 3-legs phenol
We previously reported about the single-electron device in which Sn-porphyrin protected gold nanoparticle (Au NP) acts as Coulomb island and anchored by 3-legs phenol. We obtained relatively stable electronic properties including Coulomb oscillation and stability diagram with charging energy of 0.15 eV. Here we report the electronic properties of the reverse device structure from previous system in which 3-legs phenol protected Au NP anchored by Sn-porphyrin measured at 9 K. Coulomb blockade phenomena were clearly observed with the no current region of up to 1.3 V (Fig. 1 (a)). The size of Coulomb island is estimated to be 2 nm. We also present Fermi level adjustment through modulation using bottom gate. Due to small size of Coulomb island, large drain voltage ranges of stability diagram or known as Coulomb diamond is expected. Hence, in relatively small range of Vg, we could observe partial stability diagram from our SET device. From our experiment using Vg dependent ID-VD it is shown that our SET works properly. Moreover, our SET shown comparable high charging energy of 0.34 eV with that in the previous report that using molecule as Coulomb island[1]. This high charging energy allow for Coulomb blockade at room temperature, with potential application as single electron device.
This study was partially supported by MEXT Elements Strategy Initiative to Form Core Research Center from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan; the Collaborative Research Project of Materials and Structures Laboratory, Tokyo Institute of Technology; the Collaborative Research Project of the Institute of Chemical Research, Kyoto University (Grant No. 2016-74); and the BK Plus program, Basic Science Research program (NRF-2014R1A6A1030419).
[1] A. Barreiro, H.S.J. van der Zant, L.M.K Vandersypen, Nano Lett. 12 6096 (2012)
This study was partially supported by MEXT Elements Strategy Initiative to Form Core Research Center from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan; the Collaborative Research Project of Materials and Structures Laboratory, Tokyo Institute of Technology; the Collaborative Research Project of the Institute of Chemical Research, Kyoto University (Grant No. 2016-74); and the BK Plus program, Basic Science Research program (NRF-2014R1A6A1030419).
[1] A. Barreiro, H.S.J. van der Zant, L.M.K Vandersypen, Nano Lett. 12 6096 (2012)