Architecture of tunable three-dimensional graphene assembly with unique plasmonic properties = 특별한 플라즈모닉 특성을 가지는 3차원 그래핀 구조체 조립

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Besides two dimensional (2D) graphene sheets which show superior electrical, thermal, and mechanical proper-ties, three dimensional (3D) graphene assembly also recently garnered great attention due to its high surface area, flexible and free-standing configuration, and facile fabrication of the graphene composite with nanomaterials in practical graphene applications. However, to date, the morphology of the 3D graphene structure has been limited to spherical shape. Herein, we demonstrated the synthesis of a variety of 3D graphene assembly including sphere, twiddle, and hemisphere. Such 3D reduced graphene oxide (rGO) structures could be manipulated by controlling the aggregation pattern of the GO sheet inside the micro-droplets. The aggregation pattern depended on the diffu-sion rate of the droplet solvent that were simply tuned by the amount of an oil phase. In addition to the fabrica-tion of the versatile 3D graphene materials, their micro-porous structure was manufactured by compositing silica beads in the rGO microparticles followed by a wet etching process. Noticeably, the 3D porous hemispherical rGO revealed unique surface plasmonic characteristics similar to the single layered graphene as well as a bulk plasmon effect, which were confirmed by an electron energy-loss spectroscopy (EELS) mapping. These results are the first-time demonstration showing the plasmonic properties of the 3D graphene structure which can expand the application arena of the 3D graphene materials.
Advisors
Seo, Tae Seokresearcher서태석researcherKim, Do Hyunresearcher김도현researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2016
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2016.8,[iii, 38 p. :]

Keywords

Microfluidics▼aself-assembly▼agraphene oxide▼a3-D graphene structure▼asphere▼atwiddle▼ahollow hemisphere▼aporous structure▼agraphene plasmonics; 미세유체▼a자가조립▼a산화그래핀▼a3차원 그래핀 구조체▼a구▼a구겨진 구▼a컵▼a다공성 구조▼a그래핀 플라즈몬

URI
http://hdl.handle.net/10203/266333
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=849889&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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