Critical parameters in exfoliating graphite into graphene

被引：79

作者：

Buzaglo, Matat ^{[1
]}

Shtein, Michael ^{[1
]}

Kober, Sivan ^{[1
]}

Lovrincic, Robert ^{[2
]}

Vilan, Ayelet ^{[2
]}

Regev, Oren ^{[1
,3
]}

机构：

[1] Ben Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, Israel

[2] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel

[3] Ben Gurion Univ Negev, Ilse Katz Inst Nanoscale Sci & Technol, IL-84105 Beer Sheva, Israel

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 12期

关键词：

WALL CARBON NANOTUBES; TRANSPARENT CONDUCTORS; BLOCK-COPOLYMERS; FILMS; DISPERSIONS; DEPOSITION; MECHANISM; ENERGY; WATER;

D O I：

10.1039/c3cp43205j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Dispersing graphite into few-layers graphene sheets (GS) in water is very appealing as an environmental-friendly, low-cost, low-energy method of obtaining graphene. Very high GS concentrations in water (0.7 mg mL(-1)) were obtained by optimizing the nature of dispersant and the type of ultra-sonic generator. We find that a multi-step sonication procedure involving both tip and bath sources considerably enhances the yield of exfoliated GS. Raman and transmission electron microscopy indicate few-layers graphene patches with typical size of similar to 0.65 mu m in one dimension and similar to 0.35 mu m in the other. These were further employed in combination with water-dispersed CNTs to fabricate conductive transparent electrodes for a molecularly-controlled solar-cell with an open-circuit voltage of 0.53 V.

引用

页码：4428 / 4435

页数：8

共 39 条

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