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An electrospun polymer composite with fullerene-multiwalled carbon nanotube exohedral complexes can act as memory device
摘要： Functional polymer nanocomposites with distinctive electrical properties made of nanocarbon structures and biodegradable polymers are promising materials for the development of flexible and eco-friendly smart systems. In this work, a novel electrospun conductive polymer nanocomposite made of polycaprolactone with an exohedral complex made of multiwalled carbon nanotubes and fullerene C60 was prepared and characterized. The preparation was straightforward and the complexes self-assembled within the nanocomposite fibers. The nanocomposite showed electrical switching behavior due to charge accumulation of fullerene C60 upon electrical stimulation. Write-once read-many memory devices were fabricated by electrospinning a nanocomposite with 0.8%wt. fullerene C60 onto interdigitated coplanar electrodes. The device retained the ON state for more than 60 days and could be thermally reset, reprogrammed and erased with subsequent electrical and thermal cycling. Moreover, the electrical resistance of the device could be modulated by applying different programming voltage amplitudes and programming times, which revealed its adaptive behavior and potential application to neuromorphic systems.
关键词： Polycaprolactone,Memristor,Conductive nanocomposite
更新于2025-09-23 15:19:57
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Ga-SBA-3 A novel nanostructured material: synthesis, characterization and application
摘要： This paper reports for the first time the incorporation of gallium into the structure of the mesoporous SBA-3 material in order to modify the intrinsic acidity of the material. The nanostructured material was characterized by ICP, XRD, NMR-MAS, XPS, FTIR, SEM, TEM and UV Vis., Pyridine was used as a probe molecule for the determination of its acidity following the amount and type of acidic sites by FTIR. In addition, aniline adsorption/desorption studies and subsequent in-situ polymerization, PANI/Ga-SBA-3, were carried out with the aim of producing a nanocomposite with conductive properties. The original material had good structural regularity and acidity of Br?nsted and Lewis; the study indicates the effective incorporation of Ga into a network in tetrahedral form, with most in the interior of the lodging and a low proportion on the external surface. Gallium was introduced via post synthesis using Ga-Nitrate in appropriate conditions. The PANI/Ga-SBA-3 composite also showed a conductivity of 2.5x10-3 S/cm, higher than that of its homologs Al-SBA-3 and Al-MCM- 41.
关键词： Ga in tetrahedral form,PANI/Ga-SBA-3,Post synthesis incorporation,Br?nsted and Lewis acidity,Ga-SBA-3,conductive nanocomposite
更新于2025-09-09 09:28:46