Morphological investigations on the growth of defect-rich Bi2Te3 nanorods and their thermoelectric properties. Issue 33 (27th July 2018)

• Record Type: Journal Article
• Authors: M, Sinduja; Amirthapandian, S.; Jegadeesan, P.; Magudapathy, P.; Asokan, K.
• Is Part Of: CrystEngComm. Volume 20:Issue 33(2018)
• Page Start: 4810
• Page End: 4822
• Publication Date: 2018-07-27
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c8ce00708j
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Bi2 Te3 nanorods (NRs) have been successfully synthesized at different reaction temperatures via a surfactant-assisted hydrothermal method. Abstract : Bi2 Te3 nanorods (NRs) have been successfully synthesized at different reaction temperatures via a surfactant-assisted hydrothermal method. The experimental observations revealed that the reaction temperature, SDBS surfactant (sodium dodecylbenzene sulphonate) and its concentration affect the morphology of Bi2 Te3 . It is identified that an imperfect oriented attachment mechanism is the dominant growth mechanism for the evolution of Bi2 Te3 NRs. Moreover, a subsidiary growth mechanism namely the Oswald ripening process could also affect the Bi2 Te3 NR growth process at higher reaction temperatures. Thermoelectric property measurements revealed that flake-decorated Bi2 Te3 NRs achieved the maximum power factor value of ∼1.32 μW cm −1 K −2 at 410 K, which was higher than those of porous and smooth Bi2 Te3 NRs. Such an enhancement in the power factor of flake-decorated Bi2 Te3 NRs is primarily attributed to their outstanding electrical conductivity at 410 K.