Free-standing oligo(oxyethylene)-functionalized polythiophene with the 3,4-ethylenedioxythiophene building block: electrosynthesis, electrochromic and thermoelectric properties

2017 ◽  
Vol 228 ◽  
pp. 361-370 ◽  
Author(s):  
Yongjing Hu ◽  
Fengxing Jiang ◽  
Baoyang Lu ◽  
Congcong Liu ◽  
Jian Hou ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Building Block ◽  
Free Standing

Ultrastrong, Free-Standing and Large Nanofilms of Pyrenearamid

2019 ◽  
Author(s):  
Amalia Rapakousiou ◽  
Alejandro López-moreno ◽  
Belén Nieto-Ortega ◽  
M. Mar Bernal ◽  
Miguel A. Monclús ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Building Block ◽  
Aromatic Polyamide ◽  
Free Standing ◽  
Spatial Confinement ◽  
Polymeric Structure ◽  
Reduced Modulus ◽  
Organizational Arrangement ◽  
Polycyclic Aromatic ◽  
Nanoscale Building Block

We introduce poly(1,6-pyrene terephthalamide) polymer (PPyrTA) as an aromatic polyamide analogue of poly(p-phenylene terephthalamide) (PPTA), also known as Kevlar®. This work shows that the incorporation of polycyclic aromatic pyrene moieties improves drastically the mechanical properties of the polymeric structure, increasing elastic nanoindentation-determined modulus and hardness by factors of 1.9 and 4.3, respectively. Liquid deprotonated dispersions of PPyrTA nanofibers were used as nanoscale building block for producing large-surface, free-standing polymer macroscopic nanofilms. This 2D assembly leads to further significant improvements in reduced modulus and hardness (more than twice) compared to the starting polymer macroscale fibres, due to a better re-organizational arrangement of the PPyrTA nanofibers in the nanofilms, formed under 2D spatial confinement.

scholarly journals Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3808 ◽  
Author(s):  
Blazej Podlesny ◽  
Bogumila Kumanek ◽  
Angana Borah ◽  
Ryohei Yamaguchi ◽  
Tomohiro Shiraki ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Large Scale ◽  
Single Walled Carbon Nanotubes ◽  
Parent Material ◽  
Free Standing ◽  
Two Phase ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Aqueous Two Phase Extraction

Single-walled carbon nanotubes (SWCNTs) remain one of the most promising materials of our times. One of the goals is to implement semiconducting and metallic SWCNTs in photonics and microelectronics, respectively. In this work, we demonstrated how such materials could be obtained from the parent material by using the aqueous two-phase extraction method (ATPE) at a large scale. We also developed a dedicated process on how to harvest the SWCNTs from the polymer matrices used to form the biphasic system. The technique is beneficial as it isolates SWCNTs with high purity while simultaneously maintaining their surface intact. To validate the utility of the metallic and semiconducting SWCNTs obtained this way, we transformed them into thin free-standing films and characterized their thermoelectric properties.

scholarly journals Regiodivergent Biocatalytic Hydroxylation of L-Glutamine Facilitated by Characterization of Non-Heme Dioxygenases from Non-Ribosomal Peptide Biosyntheses

2021 ◽  
Author(s):  
Hans Renata ◽  
Emily Shimizu ◽  
Christian Zwick
Keyword(s):  
Amino Acid ◽  
Building Block ◽  
Solid Phase ◽  
Functional Characterization ◽  
Free Standing ◽  
Substrate Specificities ◽  
Total Turnover

We report the functional characterization of two iron- and a-ketoglutarate-dependent dioxygenases that are capable of hydroxylating free-standing glutamine at its C3 and C4 position respectively. In particular, the C4 hydroxylase, Q4Ox, catalyzes the reaction with approximately 4,300 total turnover numbers, facilitating synthesis of a solid-phase compatible building block and stereochemical elucidation at the C4 position of the hydroxylated product. This work will enable the development of novel synthetic strategies to prepare useful glutamine derivatives and stimulate further discoveries of new amino acid hydroxylases with distinct substrate specificities.<br>

scholarly journals Regiodivergent Biocatalytic Hydroxylation of L-Glutamine Facilitated by Characterization of Non-Heme Dioxygenases from Non-Ribosomal Peptide Biosyntheses

2021 ◽  
Author(s):  
Hans Renata ◽  
Emily Shimizu ◽  
Christian Zwick
Keyword(s):  
Amino Acid ◽  
Building Block ◽  
Solid Phase ◽  
Functional Characterization ◽  
Free Standing ◽  
Substrate Specificities ◽  
Total Turnover

We report the functional characterization of two iron- and a-ketoglutarate-dependent dioxygenases that are capable of hydroxylating free-standing glutamine at its C3 and C4 position respectively. In particular, the C4 hydroxylase, Q4Ox, catalyzes the reaction with approximately 4,300 total turnover numbers, facilitating synthesis of a solid-phase compatible building block and stereochemical elucidation at the C4 position of the hydroxylated product. This work will enable the development of novel synthetic strategies to prepare useful glutamine derivatives and stimulate further discoveries of new amino acid hydroxylases with distinct substrate specificities.<br>

Thermoelectric properties of and devices based on free-standing GaN

2005 ◽  
Vol 86 (25) ◽  
pp. 252102 ◽  
Author(s):  
Shigeo Yamaguchi ◽  
Ryohei Izaki ◽  
Nakaba Kaiwa ◽  
Atsushi Yamamoto
Keyword(s):  
Thermoelectric Properties ◽  
Free Standing

Electrochemical Treatment for Effectively Tuning Thermoelectric Properties of Free-Standing Poly(3-methylthiophene) Films

ChemPhysChem ◽  
2016 ◽  
Vol 17 (14) ◽  
pp. 2256-2262 ◽  
Author(s):  
Yongjing Hu ◽  
Danhua Zhu ◽  
Zhengyou Zhu ◽  
Endou Liu ◽  
Baoyang Lu ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Electrochemical Treatment ◽  
Free Standing

Thermoelectric properties and thermoelectric devices of free-standing GaN and epitaxial GaN layer

2007 ◽  
Vol 515 (10) ◽  
pp. 4501-4504 ◽  
Author(s):  
N. Kaiwa ◽  
M. Hoshino ◽  
T. Yaginuma ◽  
R. Izaki ◽  
S. Yamaguchi ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Devices ◽  
Free Standing

Free-standing Pt and Pd nanowires: strain-modulated stability and magnetic and thermoelectric properties

2018 ◽  
Vol 20 (44) ◽  
pp. 28114-28123 ◽  
Author(s):  
Shivam Kansara ◽  
Sanjeev K. Gupta ◽  
Yogesh Sonvane ◽  
Ashok Kumar
Keyword(s):  
Thermoelectric Properties ◽  
Free Standing ◽  
Lagrangian Strain ◽  
Pd Nanowires

The concept diagram for (a) when B = 0, the Fermi–Dirac distributions are equal so M = 0 and (b) when the Lagrangian strain is applied, all the anti-parallel spin changes to parallel spins.

Ultrastrong, Free-Standing and Large Nanofilms of Pyrenearamid

2019 ◽  
Author(s):  
Amalia Rapakousiou ◽  
Alejandro López-moreno ◽  
Belén Nieto-Ortega ◽  
M. Mar Bernal ◽  
Miguel A. Monclús ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Building Block ◽  
Aromatic Polyamide ◽  
Free Standing ◽  
Spatial Confinement ◽  
Polymeric Structure ◽  
Reduced Modulus ◽  
Organizational Arrangement ◽  
Polycyclic Aromatic ◽  
Nanoscale Building Block

We introduce poly(1,6-pyrene terephthalamide) polymer (PPyrTA) as an aromatic polyamide analogue of poly(p-phenylene terephthalamide) (PPTA), also known as Kevlar®. This work shows that the incorporation of polycyclic aromatic pyrene moieties improves drastically the mechanical properties of the polymeric structure, increasing elastic nanoindentation-determined modulus and hardness by factors of 1.9 and 4.3, respectively. Liquid deprotonated dispersions of PPyrTA nanofibers were used as nanoscale building block for producing large-surface, free-standing polymer macroscopic nanofilms. This 2D assembly leads to further significant improvements in reduced modulus and hardness (more than twice) compared to the starting polymer macroscale fibres, due to a better re-organizational arrangement of the PPyrTA nanofibers in the nanofilms, formed under 2D spatial confinement.

Tunable thermoelectric properties of free-standing PEDOT nanofiber film through adjusting its nanostructure

2021 ◽  
Vol 275 ◽  
pp. 116742
Author(s):  
Haijun Song ◽  
Yuanyuan Yao ◽  
Chengli Tang ◽  
Libing Zhang ◽  
Yebo Lu ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Free Standing ◽  
Nanofiber Film
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