title: Long-term stability of CdSe/CdZnS quantum dot encapsulated in a multi-lamellar microcapsule.
abstract: We developed a novel and easy encapsulation method for quantum dots (QDs) using a partially oxidized semi-crystalline polymeric material which forms a micron-sized granule with a multi-lamellar structure from a dilute solution. The QDs were highly dispersed in the granule in such a way that they were adsorbed on the lamella with ∼12 nm spacing followed by lamellar stacking. The QDs were heavily loaded into the granule to 16.7 wt% without aggregation, a process which took only a few minutes. We found that the quantum yield of the QDs was not degraded after the encapsulation. The encapsulated QD-silicone composite exhibited excellent long-term photo- and thermal stability with its initial photoluminescence intensity maintained after blue LED light radiation for 67 days and storage at 85 °C and 85% relative humidity for 119 days.
authors.affiliation: Department of Nano Science & Technology, Sejong Polymer Research Center, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, 143-747, Korea.
authors.forename: Sang-Yul
authors.initials: SY
authors.lastname: Park
authors.forename: Hyo-Sun
authors.initials: HS
authors.lastname: Kim
authors.forename: Jeseung
authors.initials: J
authors.lastname: Yoo
authors.forename: Suyong
authors.initials: S
authors.lastname: Kwon
authors.forename: Tae Joo
authors.initials: TJ
authors.lastname: Shin
authors.forename: Kyungnam
authors.initials: K
authors.lastname: Kim
authors.forename: Sohee
authors.initials: S
authors.lastname: Jeong
authors.forename: Young-Soo
authors.initials: YS
authors.lastname: Seo