Air-stable, surface-oxide free Cu nanoparticles for highly conductive Cu ink and their application to printed graphene transistors

被引:134
作者
Jeong, Sunho [1 ]
Lee, Su Hyeon [1 ,2 ]
Jo, Yejin [1 ]
Lee, Sun Sook [1 ]
Seo, Yeong-Hui [1 ]
Ahn, Byeong Wan [3 ]
Kim, Gyeomuk [3 ]
Jang, Gun-Eik [2 ]
Park, Jang-Ung [3 ]
Ryu, Beyong-Hwan [1 ]
Choi, Youngmin [1 ]
机构
[1] Korea Res Inst Chem Technol, Adv Mat Div, Taejon 305600, South Korea
[2] Chungbuk Natl Univ, Chonju 361763, South Korea
[3] UNIST, Low Dimens Carbon Mat Ctr, Sch Mech & Adv Mat Engn, Sch Nanobiosci & Chem Engn, Ulsan 689798, South Korea
关键词
THIN-FILM TRANSISTORS; COPPER NANOPARTICLES; CARBON NANOTUBES; ROOM-TEMPERATURE; CARBOXYLIC-ACID; OLEIC-ACID; SILVER; ELECTRODE; LAYER; FABRICATION;
D O I
10.1039/c3tc00904a
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Air-stable, surface-oxide free Cu nanoparticles are, for the first time, synthesized by surrounding completely the Cu surface with oleic acid incorporated as a capping molecule. XPS analysis, in conjunction with TEM analysis, revealed that the oleic acid is chemisorbed to the Cu surface via a chemical interaction wherein a monodentate bond is included, without leaving behind free (non-interacting) oleic acid, thereby providing complete surface protection against oxidation. By eliminating the surface oxide layer that critically degrades the electrical properties, the surface-oxide free Cu nanoparticle ink facilitates the realization of a solution-processed Cu electrode layer with resistivity as low as 4 mu Omega cm, comparable to the resistivity of noble metal-based, solution-processed counterparts. In addition, high resolution Cu electrode patterns with 5 mu m line-width are directly printed using an electrohydrodynamic inkjet technique, and graphene transistors with the printed Cu electrodes demonstrate potential applications in printed electronics.
引用
收藏
页码:2704 / 2710
页数:7
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