A. V. Vakhrushev, A. Y. Fedotov, A. V. Severyukhin, R. Valeev
{"title":"Investigation of the Formation of Nanofilms on the Substrates of Porous Aluminum Oxide","authors":"A. V. Vakhrushev, A. Y. Fedotov, A. V. Severyukhin, R. Valeev","doi":"10.1201/9781351138789-9","DOIUrl":"https://doi.org/10.1201/9781351138789-9","url":null,"abstract":"","PeriodicalId":91581,"journal":{"name":"Nanoscience and nanoengineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80483543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N Miyoshi, S K Kundu, T Tuziuti, K Yasui, I Shimada, Y Ito
{"title":"Combination of Sonodynamic and Photodynamic Therapy against Cancer Would Be Effective through Using a Regulated Size of Nanoparticles.","authors":"N Miyoshi, S K Kundu, T Tuziuti, K Yasui, I Shimada, Y Ito","doi":"10.13189/nn.2016.040101","DOIUrl":"10.13189/nn.2016.040101","url":null,"abstract":"<p><p>Nanoparticles have been used for many functional materials in nano-sciences and photo-catalyzing surface chemistry. The titanium oxide nanoparticles will be useful for the treatment of tumor by laser and/or ultrasound as the sensitizers in nano-medicine. We have studied the combination therapy of photo- and sono-dynamic therapies in an animal tumor model. Oral-administration of two sensitizers titanium oxide, 0.2%-TiO<sub>2</sub> nanoparticles for sono-dynamic and 1 mM 5-aminolevulinic acid for photodynamic therapies have resulted in the best combination therapeutic effects for the cancer treatment. Our light microscopic and Raman spectroscopic studies revealed that the titanium nanoparticles were distributed inside the blood vessel of the cancer tissue (1-3 μm sizes). Among these nanoparticles with a broad size distribution, only particular-sized particles could penetrate through the blood vessel of the cancer tissue, while other particles may only exhibit the side effects in the model mouse. Therefore, it may be necessary to separate the optimum size particles. For this purpose we have separated TiO<sub>2</sub> nanoparticles by countercurrent chromatography with a flat coiled column (1.6 mm ID) immersed in an ultrasonic bath (42 KHz). Separation was performed with a two-phase solvent system composed of 1-butanol-acetic acid-water at a volume ratio of 4:1:5 at a flow rate of 0.1 ml/min. Countercurrent chromatographic separation yielded fractions containing particle aggregates at 31 and 4400 nm in diameter.</p>","PeriodicalId":91581,"journal":{"name":"Nanoscience and nanoengineering","volume":"4 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4827930/pdf/nihms748035.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34409859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Usha, B. Mondal, D. Sengupta, P. Das, K. Mukherjee, P. Kumbhakar
{"title":"Fabrication of Dye Sensitized Solar Cell Using Nanocrystalline TiO2 and Optical Characterization of Photo-Anode","authors":"K. Usha, B. Mondal, D. Sengupta, P. Das, K. Mukherjee, P. Kumbhakar","doi":"10.13189/NN.2014.020201","DOIUrl":"https://doi.org/10.13189/NN.2014.020201","url":null,"abstract":"Anatase phase containing nano-crystallite TiO2 thin film is prepared by the peptization of modified Ti-isopropoxide sol using HNO3 as peptizing agent. The resulting sol is concentrated in a rotary evaporator bath. TiO2 film is deposited on ITO substrate by spin coating process. The compact film is annealed at 450˚C and 500˚C for optical studies. The subsequently it is modified as photo-anodes in dye sensitized solar cells. The prepared materials are characterized by X-ray diffraction (XRD), UV-Vis absorption spectroscopy and high resolution transmission electron microscopy (HRTEM). The colloidal particles are 6-8nm in average size while the grain growth of the particles are in the order of 13-20nm after annealing of the thin film. The obtained lattice constants of the TiO2 nanocrystals are a=3.79A and c=9.48A from XRD data as compared to JCPDS data of a=3.79A and c=9.52A. The photo conversion efficiency of assembled dye sensitized solar cells comprising of ~5µm thickness of the film are determined to be of the order of 6.77%.","PeriodicalId":91581,"journal":{"name":"Nanoscience and nanoengineering","volume":"83 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75969736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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