Masanobu Sagisaka, M. Hino, H. Sakai, M. Abe, A. Yoshizawa
{"title":"含氟双尾表面活性剂的水/超临界CO2微乳用于半导体超细颗粒的合成","authors":"Masanobu Sagisaka, M. Hino, H. Sakai, M. Abe, A. Yoshizawa","doi":"10.4011/SHIKIZAI.81.331","DOIUrl":null,"url":null,"abstract":"A water/supercritical CO 2 microemulsion (W/scCO 2 μE) with a fluorinated double-tail surfactant bis (1H,1H,2Η,2H-heptadecanuorodecyl)-2-sulfosuccinate (8FS(EO) 2 ) was evaluated in terms of its nanoreactor performance for synthesizing semiconductor ultrafine particles of TiΟ 2 , ZnS, and CdS. By the addition of tetraisopropylorthotitanate (TIP) in W/scCO 2 μE, TiO 2 ultrafine particles were successfully synthesized with a spherical shape and sizes of several tens of nanometers, which were similar to those synthesized in W/cyclohexane μE with a typical hydrocarbon double-tail surfactant AOT. Interestingly, in contrast to the μE system, TiO 2 particle syntheses in liquid-crystal-like (LC-like) surfactant precipitant phase yielded a dendritical morphology of TiO 2 . For metal sulfide synthesis, the addition of metal nitrates as precursors in W/scCO 2 μE was found to lower the maximum W 0 value at which W/scCΟ 2 μE can form, which would result from the promoted aggregation and fusion between reverse micelles, i.e., LC formation. After mixing both the W/scCΟ 2 μEs containing metal nitrate and Na 2 S, metal sulfide ultrafine particles were yielded with spherical shape and sizes of several tens of nanometers. These results suggested that W/scCΟ 2 μE with 8FS (EO) 2 may become a valuable nanoreactor when further investigations reveal size-control techniques for the products.","PeriodicalId":21870,"journal":{"name":"Shikizai Kyokaishi","volume":"43 1","pages":"331-340"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":"{\"title\":\"Water/Supercritical CO2 Microemulsions with a Fluorinated Double-tail Surfactant for Syntheses of Semiconductor Ultrafine Particles\",\"authors\":\"Masanobu Sagisaka, M. Hino, H. Sakai, M. Abe, A. Yoshizawa\",\"doi\":\"10.4011/SHIKIZAI.81.331\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A water/supercritical CO 2 microemulsion (W/scCO 2 μE) with a fluorinated double-tail surfactant bis (1H,1H,2Η,2H-heptadecanuorodecyl)-2-sulfosuccinate (8FS(EO) 2 ) was evaluated in terms of its nanoreactor performance for synthesizing semiconductor ultrafine particles of TiΟ 2 , ZnS, and CdS. By the addition of tetraisopropylorthotitanate (TIP) in W/scCO 2 μE, TiO 2 ultrafine particles were successfully synthesized with a spherical shape and sizes of several tens of nanometers, which were similar to those synthesized in W/cyclohexane μE with a typical hydrocarbon double-tail surfactant AOT. Interestingly, in contrast to the μE system, TiO 2 particle syntheses in liquid-crystal-like (LC-like) surfactant precipitant phase yielded a dendritical morphology of TiO 2 . For metal sulfide synthesis, the addition of metal nitrates as precursors in W/scCO 2 μE was found to lower the maximum W 0 value at which W/scCΟ 2 μE can form, which would result from the promoted aggregation and fusion between reverse micelles, i.e., LC formation. After mixing both the W/scCΟ 2 μEs containing metal nitrate and Na 2 S, metal sulfide ultrafine particles were yielded with spherical shape and sizes of several tens of nanometers. These results suggested that W/scCΟ 2 μE with 8FS (EO) 2 may become a valuable nanoreactor when further investigations reveal size-control techniques for the products.\",\"PeriodicalId\":21870,\"journal\":{\"name\":\"Shikizai Kyokaishi\",\"volume\":\"43 1\",\"pages\":\"331-340\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"10\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Shikizai Kyokaishi\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4011/SHIKIZAI.81.331\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Shikizai Kyokaishi","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4011/SHIKIZAI.81.331","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Water/Supercritical CO2 Microemulsions with a Fluorinated Double-tail Surfactant for Syntheses of Semiconductor Ultrafine Particles
A water/supercritical CO 2 microemulsion (W/scCO 2 μE) with a fluorinated double-tail surfactant bis (1H,1H,2Η,2H-heptadecanuorodecyl)-2-sulfosuccinate (8FS(EO) 2 ) was evaluated in terms of its nanoreactor performance for synthesizing semiconductor ultrafine particles of TiΟ 2 , ZnS, and CdS. By the addition of tetraisopropylorthotitanate (TIP) in W/scCO 2 μE, TiO 2 ultrafine particles were successfully synthesized with a spherical shape and sizes of several tens of nanometers, which were similar to those synthesized in W/cyclohexane μE with a typical hydrocarbon double-tail surfactant AOT. Interestingly, in contrast to the μE system, TiO 2 particle syntheses in liquid-crystal-like (LC-like) surfactant precipitant phase yielded a dendritical morphology of TiO 2 . For metal sulfide synthesis, the addition of metal nitrates as precursors in W/scCO 2 μE was found to lower the maximum W 0 value at which W/scCΟ 2 μE can form, which would result from the promoted aggregation and fusion between reverse micelles, i.e., LC formation. After mixing both the W/scCΟ 2 μEs containing metal nitrate and Na 2 S, metal sulfide ultrafine particles were yielded with spherical shape and sizes of several tens of nanometers. These results suggested that W/scCΟ 2 μE with 8FS (EO) 2 may become a valuable nanoreactor when further investigations reveal size-control techniques for the products.