Search

Single-walled carbon nanotubes (SWNTs), especially their semiconducting type, are promising thermoelectric (TE) materials due to their high Seebeck coefficient. In this study, the in-plane Seebeck coefficient (S), electrical conductivity (σ), and thermal conductivity (κ) of sorted semiconducting SWNT (s-SWNT) free-standing sheets with different s-SWNT purities are measured to determine the figure of merit ZT. We find that the ZT value of the sheets increases with increasing s-SWNT purity, mainly due to an increase in Seebeck coefficient while the thermal conductivity remaining constant, which experimentally proved the superiority of the high purity s-SWNT as TE materials for the first time. In addition, from the comparison between sorted and unsorted SWNT sheets, it is recognized that the difference of ZT between unsorted SWNT and high-purity s-SWNT sheet is not remarkable, which suggests the control of carrier density is necessary to further clarify the superiority of SWNT sorting for TE applications. [ABSTRACT FROM AUTHOR]

Pertya multiflora (Asteraceae) is a rare wild plant species narrowly distributed in Zhejiang province, China. In our present study, we assembled its complete chloroplast genome using high-throughput sequencing data. The results indicated that the whole chloroplast genome of P. multiflora was 153,396 bp in length. Its large single copy, small single copy, and inverted region sequences were 84,575 bp, 18,451 bp, and 25,185 bp. The P. multiflora chloroplast genome was composed of 134 genes, including 87 protein-coding genes, 37 tRNA genes, eight rRNA genes, and two pseudogenes. Phylogenetic analysis results showed that P. multiflora was grouped with Gerbera jamesonii, with 100% bootstrap support. [ABSTRACT FROM AUTHOR]