Heterogeneous single-walled carbon nanotube catalyst discovery and optimization
Heterogeneous single-walled carbon nanotube catalyst discovery and optimization
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DOI：
10.1021/cm0116828
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发表时间：
2002-04-01
影响因子：
8.6
通讯作者：
Cassell, AM
中科院分区：
文献类型：
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作者：
Chen, B;Parker, G;Cassell, AM
高通量方法用于发现和优化促进单壁碳纳米管（SWNT）合成的非均相催化剂配方。改变催化剂组合物、基底和反应条件以有效地研究通过化学气相沉积（CVD）的单壁碳纳米管生长。采用机器人微阵列打印机将液基催化剂前体的文库打印到各种基底上。在CVD之后，通过电子显微镜定性筛选催化剂阵列的产率。更全面的表征候选催化剂进一步研究与共焦拉曼光谱（CRS）。详细的CRS映射揭示了关于微阵列中的印刷催化剂和纳米管均匀性的信息。这种强大的表征方法允许在微阵列内高通量筛选纳米管类型、直径分布和纯度。所描述的方法，使有效的探索合成参数，这导致了识别单壁碳纳米管催化剂与各种活动。
High-throughput methods are utilized in the discovery and optimization of heterogeneous catalyst formulations that promote single-walled carbon nanotube (SWNT) synthesis. Catalyst compositions, substrates, and reaction conditions are varied to efficiently investigate SWNT growth by chemical vapor deposition (CVD). A robotic microarray printer is employed to print libraries of the liquid-based catalyst precursors onto various substrates. After CVD, the catalyst arrays are qualitatively screened for yield via electron microscopy. More comprehensive characterization of candidate catalysts is further investigated with confocal Raman spectroscopy (CRS). Detailed CRS mapping reveals information concerning the printed catalyst and nanotube homogeneity in the microarrays. This powerful characterization approach allows for the high-throughput screening of nanotube type, diameter distribution, and purity within the microarrays. The methodology described has enabled the efficient exploration of synthesis parameters, which has led to the identification of SWNT catalysts with various activities.