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Sensing Properties of the <I>N</I>,<I>N</I>′-Dipentyl-3,4,9, 10-Perylenedicarboximide Small Molecule for Different Concentrations and Solvents for Sensor Applications
摘要： In present study, optical parameters based on refractive index of the PTCDI-C5 molecule were calculated using the single oscillator model. Also, significant parameters such as long wavelength refractive index, average oscillator wavelength, lattice dielectric constant, ratio of the carrier concentration to the electron effective mass, carrier concentration and electron effective mass of the PTCDI-C5 molecule were obtained. Then, sensing properties of the PTCDI-C5 molecule for different concentrations and volume percents were investigated and the effects of the concentrations and volume percents on sensing parameters were investigated. Then, the optical properties of the solutions of the PTCDI-C5 semiconductor for different solvents were investigated. Finally, these parameters obtained were discussed for sensor applications and this study was compared with the similar and related studies in the literature. PTCDI-C5 can be used in the fabrication of various sensors due to good soluble, optical, sensitivity and response behaviour.
关键词： Wemple DiDomenico Technique,Sensor Applications,PTCDIC5,One Dimensional Organic Nanostructures,Sensing Parameters,Sensitivity
更新于2025-09-23 15:23:52
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Preparation and characterization of organic nanoparticles by laser ablation in liquids technique and their biological activity
摘要： The laser ablation in liquids (LAL) method was used for the synthesis of organic colloidal nanoparticles in deionized water as a liquid medium. The effect of variations of the lens-target distance and laser wavelength on the size, structure, and morphology of the nanoparticles was studied. A target of bulk organic bifenthrin compound (agricultural insecticide) was elaborated for the ablation process. By means of ultraviolet-visible (UV–vis) absorption spectroscopy, the characteristic absorbance spectra were analyzed, con?rming the presence of nanoparticles. Furthermore, the absorbance was related to the nanoparticles concentration. Structural characterization and size determination were carried out by transmission electron microscopy (TEM). The crystalline structure of the nanoparticles was studied by comparing the interplanar distance of the nanoparticles determined by high-resolution transmission electron microscopy (HR-TEM) with the interplanar distances of the bulk material observed by x-ray diffraction (XRD). The study of chemical composition was carried out by gas chromatography coupled to mass spectrometry (GC-MS). The nanoparticles sizes varied between 3 and 20 nm, with a narrow size distribution. According to the results, both the size and structure of the nanoparticles are mainly determined by the incident energy density on the target, whilst wavelength affects morphology. On the other hand, the preliminary biological tests of the nanoparticles carried out with Drosophila melanogaster, showed an enhanced insecticide activity at signi?cant lower concentrations in comparison with doses used with bulk bifenthrin.
关键词： organic nanostructures,nanoparticles,nano-insecticide,laser ablation,bifenthrin
更新于2025-09-23 15:19:57