{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360848657383439744.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.polymer.2014.04.011"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0032386114003103?httpAccept=text/plain"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0032386114003103?httpAccept=text/xml"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Advanced synthesis for monodisperse polymer nanoparticles in aqueous media with sub-millimolar surfactants"}],"description":[{"notation":[{"@value":"Abstract   Highly monodisperse polystyrene nanoparticles with mean diameters of less than 100 nm are synthesized via aqueous emulsion polymerization using an amphoteric initiator (VA-057) in the presence of sub-millimolar concentrations of anionic surfactant. Since the net charge on the initiator is almost zero at neutral pH, the resultant latex particle size is mainly determined by surfactant adsorption. Polymerizations were performed in the presence of a range of anionic surfactants with differing critical micelle concentrations (CMC) by varying the concentrations of surfactant, initiator and monomer, and also the ionic strength. Sodium dodecyl benzene sulfonate (SDBS), sodium hexadecyl sulfate (SHS), and sodium octadecyl sulfate (SOS) have relatively low CMCs and so enable formation of highly monodisperse nanoparticles at relatively low (sub-millimolar) surfactant concentrations, CS (i.e. below the CMC in each case). Empirically, it was found that the particle number, Np, and coefficient of variation of the particle size, CV, were strongly dependent on the CS/CMC ratio: Np increased almost in proportion with the square of this ratio, while the CV exhibited a minimum at approximately CS/CMC = 0.20. Higher ionic strength reduced the particle size, which is consistent with the above relationship because the addition of salt lowers the CMCs of ionic surfactants. Polymer latex particles produced using such formulations form highly regular, close-packed colloidal arrays."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380848657383439744","@type":"Researcher","foaf:name":[{"@value":"Haruyuki Ishii"}]},{"@id":"https://cir.nii.ac.jp/crid/1380848657383439746","@type":"Researcher","foaf:name":[{"@value":"Motohiro Ishii"}]},{"@id":"https://cir.nii.ac.jp/crid/1420282801209426432","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"50374963"},{"@type":"NRID","@value":"1000050374963"},{"@type":"NRID","@value":"9000258682056"},{"@type":"NRID","@value":"9000283865715"},{"@type":"NRID","@value":"9000006568299"},{"@type":"NRID","@value":"9000003432296"},{"@type":"NRID","@value":"9000406227094"},{"@type":"NRID","@value":"9000000554593"},{"@type":"NRID","@value":"9000006802188"},{"@type":"NRID","@value":"9000414842898"},{"@type":"NRID","@value":"9000016775027"},{"@type":"NRID","@value":"9000283902437"},{"@type":"NRID","@value":"9000298897652"},{"@type":"NRID","@value":"9000411771202"},{"@type":"NRID","@value":"9000283811768"},{"@type":"NRID","@value":"9000314079311"},{"@type":"NRID","@value":"9000004596466"},{"@type":"NRID","@value":"9000406199272"},{"@type":"NRID","@value":"9000311064118"},{"@type":"NRID","@value":"9000345320054"},{"@type":"NRID","@value":"9000391868237"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0116581"}],"foaf:name":[{"@value":"Daisuke Nagao"}]},{"@id":"https://cir.nii.ac.jp/crid/1380848657383439745","@type":"Researcher","foaf:name":[{"@value":"Mikio Konno"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00323861"}],"prism:publicationName":[{"@value":"Polymer"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2014-06","prism:volume":"55","prism:number":"12","prism:startingPage":"2772","prism:endingPage":"2779"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","https://www.elsevier.com/legal/tdmrep-license"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0032386114003103?httpAccept=text/plain"},{"@id":"https://api.elsevier.com/content/article/PII:S0032386114003103?httpAccept=text/xml"}],"createdAt":"2014-04-15","modifiedAt":"2025-09-21","project":[{"@id":"https://cir.nii.ac.jp/crid/1040000782145065984","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"23246134"},{"@type":"JGN","@value":"JP23246134"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23246134/"}],"notation":[{"@language":"ja","@value":"機能性微粒子合成のための環境適合型プロセスの創成に関する研究"},{"@language":"en","@value":"Development of environmentally adaptable processes for synthesizing functional      particles"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000782265588480","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"25600001"},{"@type":"JGN","@value":"JP25600001"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-25600001/"}],"notation":[{"@language":"ja","@value":"中空粒子内微小空間の高次構造アクティブ制御による新機能の創出"},{"@language":"en","@value":"Creation of new functions by actively controlling location of an anisotropic sphere in confinement of hollow particles"}]},{"@id":"https://cir.nii.ac.jp/crid/1040282257262663680","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"26286019"},{"@type":"JGN","@value":"JP26286019"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26286019/"}],"notation":[{"@language":"ja","@value":"内包粒子の規則配列構造を外場制御できる新規中空コロイド結晶の作製と機能創出"},{"@language":"en","@value":"Fabrication of functional colloidal crystals containing movable inner cores with their locations controlled by external 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low surfactant concentrations."},{"@language":"ja","@value":"界面活性剤低濃度下でのスチレン水系析出重合におけるポリマー粒子の生成"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679565572608","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Effect of Counter Ionic Radius in Initiator on Particle Size in Soap-free Emulsion Polymerization of 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