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Fabrication of Interconnected Plasmonic Spherical Silver Nanoparticles with Enhanced Localized Surface Plasmon Resonance (LSPR) Peaks Using Quince Leaf Extract Solution
摘要： Interconnected spherical metallic silver nanoparticles (Ag NPs) were synthesized in the current study using a green chemistry method. The reduction of silver ions to Ag NPs was carried out with low-cost and eco-friendly quince leaves. For the first time, it was confirmed that the extract solution of quince leaves could be used to perform green production of Ag NPs. Fourier transform infrared spectroscopy (FTIR) was conducted to identify the potential biomolecules that were involved in the Ag NPs. The results depicted that the biosynthesis of Ag NPs through the extract solution of quince leaf was a low-cost, clean, and safe method, which did not make use of any contaminated element and hence, had no undesirable effects. The majority of the peaks in the FTIR spectrum of quince leaf extracts also emerged in the FTIR spectrum of Ag NPs but they were found to be of less severe intensity. The silver ion reduction was elaborated in detail on the basis of the FTIR outcomes. In addition, through X-ray diffraction (XRD) analysis, the Ag NPs were also confirmed to be crystalline in type, owing to the appearance of distinct peaks related to the Ag NPs. The creation of Ag NPs was furthermore confirmed by using absorption spectrum, in which a localized surface plasmon resonance (LSPR) peak at 480 nm was observed. The LSPR peak achieved in the present work was found to be of great interest compared to those reported in literature. Field emission scanning electron microscopy (FESEM) images were used to provide the morphology and grain size of Ag NPs. It was shown from the FESEM images that the Ag NPs had interconnected spherical morphology.
关键词： FESEM study,FTIR study,XRD analysis,UV–Vis absorption,quince leave,silver nanoparticles
更新于2025-09-12 10:27:22
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Spectroscopic and Simulation Analysis of Facile PEDOT:PSS Layer Deposition-Silicon for Perovskite Solar Cell
摘要： In this research work, we have characterized and simulated a well-known hole transport material (HTM) for perovskite solar cell (PSC) and conductive polymer poly (3, 4- ethylenedioxy-thiophene) - poly (styrene sulfonate) (PEDOT: PSS). The PEDOT:PSS is a better contender in the field of photovoltaic with its excellent combination of characteristics like high hole conductivity, stability and transparency. The nanocomposite PEDOT:PSS is deposited on the silicon wafer which is N-type doped for the testing the structure characteristic variations. The thin film of PEDOT:PSS over Silicon wafer is prepared with the conventional coating technique and characterized with spectroscopic techniques. The structural behavior has been disclosed under the comprehensive study of Field Emission Scanning Electron Microscopy (FESEM), Atomic Force Microscopy (AFM), and X-Ray Diffractometer (XRD) mapping. On the other hand, the important optical properties were revealed by detailed analysis by spectroscopy characterization (FTIR, UV-vis, Raman spectra) covering the range of 200–2500 nm. The maximum absorbance range of PEDOT:PSS is 270–320 nm with maximum absorption at 280.5 nm. The photovoltaic cell is simulated by using Spiro-OMeTAD and PEDOT:PSS as Hole Transport Layer (HTL) for a better comparison in terms of power efficiency, quantum efficiency and fill factor. The PSC device shows exemplary power efficiency of 11.89% and 12.13% for PEDOT:PSS & Spiro-OMeTAD as HTL respectively.
关键词： FESEM,Perovskite,Hole transport layer,FTIR,Spectroscopic analysis,Raman spectra,PEDOT:PSS
更新于2025-09-11 14:15:04
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VHF-PECVD FABRICATION PARAMETERS DEPENDENT MORPHOLOGYVARIATION OF GOLD CATALYST ASSISTED SILICON THIN FILM GROWTH
摘要： Achieving two dimensional quantum structure of silicon with well-defined tunable morphology is an outstanding issue. We present the preliminary results on fabrication parameters dependent silicon thin film production using VHF-PECVD method. Five samples are prepared on Si(100) substrate with gold (Au) catalyst by adjusting different parameters such as deposition time, temperature and the flow of precursor gas. The samples morphology are analyzed using FESEM. The results reveal that the silicon thin film appear to be smooth and more uniform after an enormous amount of hydrogen is inserted together with the precursor gas (silane) during the deposition process. More interestingly, the films exhibit silicon nanowires as the deposition time is increased up to 1 hour. This morphological transformation is attributed to the vapor-liquid-solid (VLS) mechanism related to the deposition process.
关键词： VHF-PECVD,FESEM,nanowire,VLS
更新于2025-09-10 09:29:36
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Preparation of TiO <sub/>2</sub> nanoparticles by hydrolysis of TiCl <sub/>4</sub> using water and glycerol solvent system
摘要： The anatase phase TiO2 nanoparticles (NPs) were synthesized by precipitation method using TCl4 as a precursor in a new reaction medium containing water and glycerol. The as-synthesized photocatalysts were characterized by Raman spectroscopy, Fourier Transform Infra-red Spectroscopy (FT-IR), UV-Visible spectroscopy and Field Emission Scanning Electron Microscopy (FESEM). The Raman spectra indicate the formation of crystalline anatase phase TiO2 NPs after calcination at 300 and 4000C. TiO2 NPs formation was confirmed by observing the major characteristic, FT-IR vibration bands of Ti-O network. The band gap calculated from UV-Vis DRS spectra ranged from 3.02-3.28 eV. FESEM images exhibit spherical shape TiO2 NPs in the form of nano-clusters with crystallite sizes ranged from 9.50-26.14 nm. FESEM images show that as the calcination temperature increases, the sizes of the TiO2 NPs also increase. The inclusion of glycerol promotes the formation of smaller particles and lowers the band gap of TiO2 NPs.
关键词： precipitation method,TiO2 nanoparticles,hydrolysis,anatase phase,Raman spectroscopy,FESEM,UV-Visible spectroscopy,water and glycerol solvent system,FT-IR,TiCl4
更新于2025-09-09 09:28:46
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Current transport and capacitance-voltage characteristics of Sb2Se3/n-Si heterojunction diode prepared by electron beam evaporation
摘要： The Sb2Se3 thin film was successfully deposited on the n-Si substrate using an electron beam evaporated technique. The structural investigation was done by means of X-ray diffraction analysis. The surface morphology and elemental analysis of the synthesized films were studied by FESEM and EDAX, respectively. The electrical properties of the Sb2Se3/n-Si heterojunction were considered by current-voltage (I-V) and capacitance-voltage (C-V) measurements. The I-V results of Sb2Se3/n-Si heterojunction diode show a rectifying behavior. The junction ideality factor, barrier height, and series resistance values were extracted from the rectifying curves at different temperatures. The capacitance-voltage results show the abrupt nature of the junction under consideration.
关键词： diode,ideality factor,Antimony selenide,Electron beam,FESEM,XRD
更新于2025-09-09 09:28:46
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AIP Conference Proceedings [Author(s) 6TH INTERNATIONAL CONFERENCE ON PRODUCTION, ENERGY AND RELIABILITY 2018: World Engineering Science & Technology Congress (ESTCON) - Kuala Lumpur, Malaysia (13–14 August 2018)] - Characterization of tin oxide (SnO2) nanostructures prepared by thermal oxidation
摘要： Tin oxide (SnO2) nanocrystals and nanowires were successfully synthesized on Si (100) substrate by thermal oxidation method at different oxidation temperatures 450 oC, 500 oC and 550 oC. The synthesized nanostructures were characterized by FESEM, Uv-Vis and Photoluminescence spectrum. The morphology of the samples was confirmed by FESEM. Meanwhile, the optical properties were obtained from Uv-Vis and photoluminescence (PL) spectrum. Tin oxide nanowires were obtained at oxidation temperatures 500 oC with energy band gaps of 1.21 eV. PL emission spectra results showed that tin oxide nanowires at 500 oC exhibit first maximum peak at 450 nm (2.76 eV), second maximum peak at 500 nm excitation (2.48 eV) and third maximum highest peak at 650 nm excitation (1.91 eV). In this work, we investigate the right oxidation temperature to synthesize tin oxide nanowires. The structural and optical properties of the synthesized tin oxide thin film can be improve by oxidation temperature.
关键词： Photoluminescence,FESEM,nanowires,Tin oxide,thermal oxidation,Uv-Vis,SnO2,nanocrystals
更新于2025-09-09 09:28:46
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Preparation of High Performance Conductive Polyaniline Magnetite (PANI/Fe3O4) Nanocomposites by Sol-Gel Method
摘要： The conductivities of polyaniline magnetite (PANI/Fe3O4) nanocomposites prepared by sol-gel method were measured by standard van der Pauw DC 4-point probe method. PANI/Fe3O4 conductivity was measured as a function of wt % (5, 10, 15, 20 and 25 wt %) of Fe3O4 nanoparticles. It was observed that the conductivity of polyaniline containing certain percentage of Fe3O4 nanoparticles is slightly lower than the bulk PANI nanotubes and drastically decreases with increase of wt % Fe3O4 nanoparticles. The high conductivities of PANI/Fe3O4 nanocomposites was observed due to high concentration of dopant (oxidants) used in the polymerization process and the optimization of these composites allows this being use as a parameter for the production of nanofibers. Fourier transform infrared spectra, field emission scanning electron microscope, X-ray diffraction and ultraviolet-visible absorption spectra are used to characterize the phase structure, morphologies and functional group of the PANI/Fe3O4 composites samples. Fourier transform infrared analysis indicates the presence of PANI containing Fe3O4 nanoparticles and the field emission scanning electron microscope (FESEM) results has proven that the formation of nanofibers in the PANI/Fe3O4 nanocomposites. The crystalline phase of PANI/Fe3O4 nanocomposites studied by X-ray diffraction indicated that the Fe3O4 nanoparticles was present in the PANI matrices.
关键词： Polyaniline,Fe3O4 nanoparticles,FESEM,Conductivity,Composites
更新于2025-09-09 09:28:46