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Halide-Amine passivation in the Synthesis of Blue-emitting Indium Phosphide Quantum Dots
류익선,이도창 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Indium phosphide (InP) quantum dots (QDs) are an alternative to cadmium based QDs, can have outstanding luminescent properties and wide color gamut. Trimethylsilyl phosphine (TMSP) is most commonly used P precursor for the synthesis of InP QDs. However, it is expensive, pyrophoric, and has a strong reactivity, making it difficult to control the size of a small quantum dot synthesis. Aminophosphine, has a lower reactivity than TMSP and can easily control the size of the QDs. We synthesized blue emitting InP QDs through Magic sized clusters with aminophosphine chemistry. Aminophosphine and halide source induced halide-amine passivated Magic Sized Clusters(MSCs). With as-synthesized MSCs, we introduced Zinc Sulfide heterostructure shell. Throughout the formation of the shell, halide-amine passivation stabilized the MSCs and allowed the size of NCs to be maintained. The InP/ZnS QDs have PL peak at 454 nm with 45% PL QY.
청주 성안길 파사아드의 최근 10년간 변용에 관한 연구
김기정,류익선,김태영,반호용 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.2
The purpose of this study is to clarify the facade transfiguration of shops in 「SEONG-AN」 mall of Cheongju city in recent decade(1991∼2001). So we grasped visual change of facade itself in street views and extracted elements that we had perceived as transfiguration. The following results are obtained : 1) In use of shops, dress shops and restaurants are increased with the appearance of computer & Internet shops, but a retail store for jewels·glasses·gifts are decreased. 2) In transfiguration of facade, the size of openings is getting bigger, the exterior material of them is the movable prefabrication, and the accessories are free placed to suit their purpose. 3) In transfiguration of signboard, the size is getting bigger, the member is increased, and it has many-sided forms as like projection·sticking·locomotion.
파주운정지구 A-14 블럭 아파트 건설공사 VE 수행 사례 소개
전충근,박승병,류익선,하민철,한천구 대한건축학회지회연합회 2007 대한건축학회지회연합회 학술발표대회논문집 Vol.2007 No.1
The Korea National Housing Corporation contributes activated value engineering(VE) how to hold a plan VE competition every year. This study introduced VE working results to execute effectively plan VE competition of the Korea National Housing Corporation. A VE Job Plan was based, and the distinction on choice process of phased VE Job Plan was chosen in the stage of VE working process. The executed results due to VE proceeding about " the new construct field of apartment, A-14, Woonjeongjigu, Paju" as the project of a plan VE competition 2006 was to enforce 163 works of functional definitions, 333 items of creating ideas, and 193 achievements of ideas. Besides, VE was proposed about 46 works of increasing values and cost reduction for 103 works and 10,040,000,000 won.