5 research outputs found
MECHANICALLY STRETCHING FOLDED NANO-PI-STACKS REVEALS PICO-NEWTON ATTRACTIVE FORCES
Picoforce atomic force microscopy (AFM) and specific DNA hybridization have been used to lock onto synthetic nano-pi-stacks, revealing the secrets of thermophilic, albeit weak, pi-pi interactions. A cone-shaped dendron created an appropriate lateral spacing to ensure that most times a single stack was confined between the tip and the substrate, eliminating undesired multi-molecular pulling and greatly simplifying data analysis.X1117sciescopu
Molecular phylogenetic and biogeographical analysis of Nitraria based on nuclear and chloroplast DNA sequences
Based upon DNA sequences from six plastid regions (rbcL, psbB-psbH, trnL-trnF, rpS16, psbA-trnH, rpS16-trnK) and the internal transcribed spacer (ITS) region of nuclear ribosomal DNA, the phylogenetic relationships in the genus Nitraria and family Nitrariaceae are investigated by using methods of maximum parsimony, maximum likelihood, and Bayesian inference. Our study strongly supports the monophyly of Nitraria. Nitraria can be divided into four parts, namely, the N. sphaerocarpa group, N. retusa group, the N. roborowskii and N. tangutorum group, and a group consisting of N. schoberi, N. komarovii, N. sibirica, and N. billardieri. Ancestral area reconstruction using S-Diva shows that eastern Central Asia is most likely the place of origin, and then dispersals occurred to western Central Asia, Africa, and Australia
Conducting Polymer Nanomaterials and Their Applications
A paradigm shift takes place in the fabrication of conducting polymers from
bulky features with microsize to ultrafine features with nanometer range. Novel conducting
polymer nanomaterials require the potential to control synthetic approaches
of conducting polymer on molecular and atomic levels. In this article, the synthetic
methodology of conducting polymer has been briefly considered with chemical oxidation
polymerization and electrochemical polymerization. The recent achievements in the
fabrication of conducting polymer nanomaterials have been extensively reviewed with
respect to soft template method, hard template method and template-free method. It
also details the morphological spectrum of conducting polymer nanomaterials such as
nanoparticle, core-shell nanomaterial, hollow nanosphere, nanofiber/nanorod, nanotube,
thin film and nanopattern and nanocomposite. In addition, their applications are discussed
under nanometer-sized dimension.This work has been financially supported by the Brain Korea 21 program
of the Korean Ministry of Education and the Hyperstructured Organic Materials
Research Center supported by Korea Science and Engineering Foundation