Electrophoretic Deposition of In2O3 nanoparticles prepared by PLAL in Water

Indium oxide nanoparticles were prepared in water using Laser Pulsed Ablation technique in Liquid (PLAL). The Nd:YAG laser was used as an ablation source. The nanoparticles are deposited onto Si wafers by direct overcastting method and also glass substrates covered with Indium Tin Oxide (ITO) by electrophoretic deposition (EPD) method. The optical properties for the colloid (nanoparticles in water) are studied with spectrophotometers. UV–vis spectral analysis showed that the solutions have absorption edge at 3 eV and average particle size about 30 nm. In order to estimate the particle size of In2O3 in water, the colloidal solutions have been deposited on silicon wafers and imaged by Atomic Force Microscopy (AFM). On the other hand, the Scanning Electron Microscope (SEM) is used to study the topographic nature of of the prepared thin film. The results of the spectrophotometric analysis shows that the average energy gap and average particle size of In2O3 nano particles were about 3 eV and about 30 nm; respectively. Interference technique which used to identify the thickness of the films, deposited by electrophoretic deposition, showed that the thickness is about 90 nm. The images of SEM showed that the film, prepared by electrophoretic deposition on ITO substrates, is of porous structure. We observed that the overall process time in this case is much shorter than CVD and PVD. لاقتنلااب بیسرتلا ا تامیسجل يئابرھكل In2D3 ةیونانلا یرطب ةرضحملا ةق PLAL يف ءاملا ةصلاخلا . يضبنلا رزیللا لامعتساب لئاسلا يف طشقلا ةینقت مادختساب ءاملا يف ةیونانلا مویدنلاا دیسكوأ تامیسج ریضحت مت مویمدوینلا رزیل مادختسا مت رشابملا بیسرتلا ةقیرط ةطساوب ةیونانلا تامیسجلا تبسر . طشاق يئوض ردصمك كای وكیلیس حئارش ىلع مویدنلااب بوشملا ریدصقلا دیسكوأب ةاطغم ةیجاجز دعاوق ىلع تبسر دقو ةین ةامسملا ITO Eng. &Tech.Journal, Vol. 33,Part (B), No.2, 2015 Electrophoretic Deposition of In2O3 nanoparticles prepared by PLAL in Water (ءاملا يف ةیونانلا تامیسجلا) يورغلا لولحملل ةیرصبلا صاوخلا تسرُد . يئابرھكلا لاقتنلاا ةقیرط ةطساوب یجاجزلا دعاوقلا ىلع ادج قیقر ءاشغ لكشب تبسر دقو يئوضلا فیطلا سایقم ةطساوب ةنوشخ ریدقت ضرغل . ة ةطساوب اھریوصتو ةینوكیلیس حئارش ىلع يورغلا لولحملا بسر ةیونانلا تامیسجلا مجحو حطسلا ةوقلا رھجم ةیرذلا AFM ةفرعمل حساملا ينورتكللاا رھجملا ةطساوب مویدنلاا دیسكولأ قیقرلا ءاشغلا روّصُ ىرخأ ةیحان نم . ترھظأ . رضحملا يونانلا ءاشغلا حطس ةعیبط ةیونانلا تامیسجلا كلاتما يئوضلا فیطلا سایقم تلایلحت جئاتن دودحب ةقاط ةوجف لدعمل 3 دودحب رطق لدعمو تلوف نورتكلا 30 رتمونان . ءاشغلا كمس نّأ رزیللا ةقیرط ترھظأ دعاوق ىلع يئابرھكلا لاقتنلاا ةقیرطب بسرملا ITO دودحب وھ 90 ينورتكللاا رھجملا روص رھظأ . رتمونان ا دعاوق ىلع يئابرھكلا لاقتنلاا ةطساوب رضحملا ءاشغلا نّأ حسامل ITO نمزلا نأ ظحول . يماسم بیكرت وذ وھ يئایمیكلا بیسرتلا وأ غارفلا يف يرارحلا ریخبتلا ةینقتب بیسرتلل مزلالا نمزلا نم ریثكب لقأ ةلاحلا هذھ يف يلكلا يراخبلا . INTRODUCTION n the last decade, there has been a great interest in deposition of ultra thin films from the nanoparticles (NPs) because of their promising applications in solar cells, gas sensors and optical photodetectors [1]. Plenty of techniques were used for the generation of nanoparticles. The most common techniques are vapor phase transport (VPT) [2], chemical vapor deposition (CVD) [3], diode sputtering (DS) [4], and Molecular Beam Epitaxi (MBE) [5]. However most of these techniques are still costly, and generally require a costly vacuum chamber for the precise control of atmospheric conditions and temperature [2, 7]. In the last decades, Pulsed laser ablation in liquid (PLAL) used for the generation of nanoparticles has been reported as an alternative technique for the controlled fabrication of various nanoparticles of noble metals, oxides and semiconductors [6]. PLAL facilitates the production of crystallized nanoparticles in a single step procedure without subsequent heat-treatment. Pure colloidal solutions can be formed without the formation of by-products. However, many of these solutions that contain nanoparticles are usually suffering from aggregation and agglomeration. Fortunately, some chemicals called surfactants could be added to the liquids in order to prevent aggregation and to control the size distribution. In Pulsed Laser Ablation in Liquid (PLAL), the irradiances are about (10-10 W/cm) which sufficient to generate plasma at the interface between the metallic target and the liquid. This process leads to generation a shock wave that induces plasma with high pressure and temperature. The transient pressure in front of the plasma plume can push the metallic species such as ions, atoms and clusters into the expanded plasma–liquid interfacial region [2, 5, 6]. Recent research interest in nanoscience and nanotechnology has focused on discovering facile techniques to manipulate materials that historically have shown to be difficult to handle because of their size [7]. The electrophoretic deposition (EPD) is one of the promising techniques to deposite TiOR2R and ZnO films that frequently used for dye sensitize solar cells [8]. In addition to its simplicity, the main advantages of EPD are site-selectivity, dense packing of the nanomaterials, size-scalability of the film, and marked control over the deposition thickness of the film [7]. In this work, we studied the optical properties of In2O3 nanoparticles in water. The resulting nanoparticles have been deposited on silicon substrates using overcastting and I