本文選題：Ag/Ag_2S + 核殼結(jié)構(gòu)��； 參考：《青島科技大學(xué)》2017年碩士論文

【摘要】：銀基復(fù)合材料由于其在近紅外光區(qū)優(yōu)異的光吸收和光熱轉(zhuǎn)換性能在光熱腫瘤治療方面受到廣泛關(guān)注。本論文分別制備了Ag@Ag_2S核殼結(jié)構(gòu)、Ag_2S/Ag異質(zhì)結(jié)構(gòu)和“藍(lán)銀”絡(luò)合物。用XRD和TEM等測試方法對樣品進(jìn)行了表征,測試了其光吸收和光熱性能,并計(jì)算了其光熱轉(zhuǎn)換效率。結(jié)果如下:1.以納米Ag立方體和類球形顆粒作為模板分別制備得到八足蟲Ag@Ag_2S和類球形Ag@Ag_2S。與納米Ag顆粒相比,八足蟲Ag@Ag_2S和類球形Ag@Ag_2S的光吸收峰明顯寬化,同時(shí)其在可見到近紅外光區(qū)的吸收強(qiáng)度明顯增強(qiáng)。質(zhì)量分?jǐn)?shù)為0.01%的八足蟲Ag@Ag_2S和類球形Ag@Ag_2S樣品在808 nm激光照射下的最大溫升分別為35 oC和38 oC,其光熱轉(zhuǎn)換效率分別為58.56%和63.07%。結(jié)果表明兩種形貌的Ag@Ag_2S與單一組分Ag和Ag_2S相比均具有增強(qiáng)的光熱轉(zhuǎn)換性能。2.通過原位還原Ag_2S納米顆粒制備得到Ag_2S/Ag異質(zhì)結(jié)構(gòu)。與Ag_2S納米顆粒相比,Ag_2S/Ag異質(zhì)結(jié)構(gòu)在400 nm處出現(xiàn)吸收峰,同時(shí)在近紅外光區(qū)的吸收強(qiáng)度增強(qiáng)。質(zhì)量分?jǐn)?shù)為0.01%的Ag_2S/Ag在808 nm激光照射下的最大溫升和光熱轉(zhuǎn)換效率分別為17.2 oC和51.27%,相對于單一組分Ag_2S具有增強(qiáng)的光熱轉(zhuǎn)換性能。3.將AgNO_3水溶液和聚丙烯酸鈉(P30)水溶液混合制備得到“藍(lán)銀”絡(luò)合物,對其進(jìn)行了光吸收和光熱性能測試,并計(jì)算了光熱轉(zhuǎn)換效率。結(jié)果表明:“藍(lán)銀”絡(luò)合物在600-900 nm有一個(gè)較強(qiáng)的光吸收峰;在808 nm激光照射下“藍(lán)銀”絡(luò)合物隨著質(zhì)量分?jǐn)?shù)由0.005%增加到0.05%時(shí),其最大溫升由14.6 oC增加到48.9 oC,其光熱轉(zhuǎn)換效率在質(zhì)量分?jǐn)?shù)為0.03%達(dá)到最大,為68.79%。
[Abstract]:Silver matrix composites have attracted much attention in photothermal tumor therapy for their excellent optical absorption and photothermal conversion in near infrared region.In this thesis, the Ag@Ag_2S core-shell structure and the "blue silver" complex have been prepared.The samples were characterized by XRD and TEM, their optical absorption and photothermal properties were tested, and the photothermal conversion efficiency was calculated.The result is as follows: 1.Using nano-Ag cube and spherical particles as templates, octopoda Ag@Ag_2S and spherical Agbo-like Ag2s were prepared respectively.Compared with Ag nanoparticles, the photoabsorption peaks of Ag@Ag_2S and spherical Ag@Ag_2S were obviously widened, and the absorption intensity in the near infrared region was obviously enhanced.The maximum temperature rise of octopoda Ag@Ag_2S and spherical Ag@Ag_2S samples with 0.01% mass fraction under 808 nm laser irradiation was 35oC and 38oC, respectively, and the photothermal conversion efficiency was 58.56% and 63.07%, respectively.The results show that the photothermal conversion properties of Ag@Ag_2S with two morphologies are enhanced as compared with that of Ag and Ag_2S.Ag_2S/Ag heterostructures were prepared by in situ reduction of Ag_2S nanoparticles.Compared with Ag_2S nanoparticles, the absorption peak of AgS-1 / Ag heterostructure at 400nm is observed, and the absorption intensity in near-infrared region is enhanced.The maximum temperature rise and photothermal conversion efficiency of 0.01% Ag_2S/Ag irradiated by 808 nm laser are 17.2oC and 51.27oC, respectively. Compared with single-component Ag_2S, the maximum temperature rise and photothermal conversion efficiency of Ag_2S/Ag are enhanced by 0.3oC and 51.27oC, respectively.The "blue silver" complex was prepared by mixing AgNO_3 aqueous solution with sodium polyacrylate (P30) solution. The photoabsorption and photothermal properties of the complex were measured and the photothermal conversion efficiency was calculated.The maximum temperature rise is increased from 14.6 OC to 48.9 OC, and the photothermal conversion efficiency reaches the maximum at 0.03%, 68.79 鈩，

本文編號：1744608