A single molecule switch based on two Pd nanocrystals linked by a conjugated dithiol

Pramana

G U Kulkarni¹  Ved Varun Agrawal¹  Reji Thomas¹  C N R Rao1¹ 

[1] Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560 064, India$$

关键词: Conducting molecule;    nanocrystals;    scanning tunneling microscopy;    negative differential resistance.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Tunneling spectroscopy measurements have been carried out on a single molecule device formed by two Pd nanocrystals (dia. ∼ 5 nm) electronically coupled by a conducting molecule, dimercaptodiphenylacetylene. The 𝐼–𝑉 data, obtained by positioning the tip over a nanocrystal electrode, exhibit negative differential resistance (NDR) on a background M-I-M characteristics. The NDR feature occurs at ∼ 0.67 V at 300 K and shifts to a higher bias of 1.93 V at 90 K. When the tip is held in the middle region of the device, a Coulomb blockade region is observed (± ∼ 0.3 V).

【 授权许可】

Unknown