- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Synthesis of Naphthalenediimide-Based Co-Polymers for <i>n</i> -Channel Organic Field-Effect Transistors
摘要： Two copolymers containing alternating electron-donating and electron-accepting units, based on naphthalene diimide and bithiophene vinylene bithiophene with different pendant groups, i.e., C24 (P(NDI-T2VT2)-24) and C28 (P(NDI-T2VT2)-28) are synthesized via Stille-coupling polymerization reaction to study the effect of length of the alkyl side chain on the performance of n-type organic ?eld-effect transistors (OFETs). The thermal stability, optical absorption, thin-?lm crystallinity, and electronic properties of the OFETs with the copolymers are investigated. Both polymers showed reliable n-type transistor characteristics with electron mobility of 0.015 cm2/Vs (C24) and 0.019 cm2/Vs (C28) with a standard deviation of 0.01 from 36 devices. Furthermore, (P(NDI-T2VT2))-C28 OFETs showed slightly better device mobility than C24 because of their better solubility and crystallinity. Mobilities up to 0.019 cm2/Vs are recorded for (P(NDI-T2VT2))-C28 are analyzed.
关键词： Extended π-Conjugation,Bithiophene Vinylene Bithiophene,Electron Transport,Naphthalene Diimide (NDI)
更新于2025-09-09 09:28:46
-
A Selective Approach for the Synthesis of Functional Oligosiloles
摘要： Synthesis of Quinoidal Fused Oligosiloles by Rhodium-Catalyzed Stitching Reaction and Theoretical Investigation of Their Properties
关键词： rhodium catalysis,oligomers,conjugation
更新于2025-09-09 09:28:46
-
Modifica??o da superfície do ZnAl1,9Eu0,05O4 visando a obten??o do híbrido ZnAl1,9Eu0,05O4/SiO2 para aplica??o como biossensor
摘要： This study aimed to investigate the influence of surface modification of ZnAl1.9Eu0.05O4 nanoparticles for obtaining hybrid ZnAl1.9Eu0.05O4/SiO2 for application as a biosensor. Initially ZnAl1.9Eu0.05O4 nanoparticles were synthesized by combustion reaction and, subsequently, their surfaces were modified with silane agent. The samples were characterized by X-ray diffraction, scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and excitation and emission spectroscopy. The results showed formation of ZnAl2O4 as the major phase. By SEM, hard agglomerates, irregularly shaped in the form of plaques, with the presence of few irregular and variables pores were observed. The surface modification was confirmed by FTIR through the silanol and siloxane groups. The excitation and emission spectra revealed the presence of a broadband of ZnAl2O4 matrix, and fine and intense transitions from europium ion arising from doping of non-stoichiometric ZnAl2O4 with the europium. From the results of emission and excitation, it was observed that the luminescence of ZnAl1.9Eu0.05O4/SiO2 hybrid presented a small decrease in relation to the ZnAl1.9Eu0.05O4 nanoparticles. This decrease was almost insignificant in relation to the benefits of silanization caused by the introduction of functional groups that promote combination of hybrid ZnAl1.9Eu0.05O4/SiO2 with biomolecules, being this promising for application as a biosensor used in the biomedical field for the diagnosis and treatment of diseases.
关键词： luminescence,biosensor,biological conjugation,surface modification
更新于2025-09-04 15:30:14