Polycyclic heavy hydrocarbons (HHs) such as coal, tar, and pitch are a family of materials with extremely rich and complex chemistry, representing a massive opportunity for their use in a range of potential applications. The present work shows that optimal selection of initial HHs based on molecular constituents is essential in tuning the material for a particular and targeted electronic application. Combining the selection of feedstock chemistry (H:C and aromatic content) and controlling variable laser treatment parameters (laser power, speed, and focus) lead to full control over the H:C ratio, spsup2/sup concentration, and degree of graphitic stacking order of the products. The broad intertunability of these factors results from a wide distribution of carbon material crystallinity from amorphous to highly graphitic and a broad distribution of electrical conductivity up to 10sup3/sup S/m.
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机译：多环重型碳氢化合物（HHS）如煤，焦油和沥青，是一种具有极其丰富和复杂的化学物质的材料，代表了在一系列潜在应用中使用的大量机会。本作者表明，基于分子成分的最佳选择是在调整特定和有针对性的电子应用的材料方面是必不可少的。结合原料化学的选择（H：C和芳族含量）和控制可变激光处理参数（激光功率，速度和焦点）导致对H：C比的完全控制，SP 2 浓度以及产品的石墨堆叠顺序的程度。这些因素的广泛互通性是由于从非晶的碳材料结晶度广泛分布到高度石墨和电导率的广泛分布，最高可达10 3 s / m。
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