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采用研制的大体积射频等离子体红外加热化学气相沉积设备,在600℃的低温下,在5cm×5cm大的Ni片上生长出碳纳米管薄膜.扫描电镜(SEM)和透射电镜(TEM)观察显示,碳纳米管薄膜具有很好的均匀性,管径大约为70~90nm.随机地对样品的3个不同区域进行了场发射特性的测试,结果表明这种薄膜具有良好的场发射特性及一致性.开启电场约为2.4V/μm,在电场为6.6V/μm时的发射电流密度达到1635μA/cm2.实验结果表明在低温条件下,大面积生长场发射用碳纳米管薄膜是可行的.

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