利用脉冲真空电弧放电形成纳米粒子的新型装置
脉冲真空电弧气相沉积是通过简单工艺产生金属离子以形成超薄膜和纳米粒子的唯一方法。
可以获得其它气相沉积方法无法获得的效果,例如膜的平坦度和细颗粒的形成。
用途
- APD-S(衬底沉积模型)
金属薄膜(磁性,等离激元,保护膜) - APD-P(粉末承载模型)
使用纳米颗粒的燃料电池催化剂、废气催化剂、光催化剂、公允值分解催化剂、碳纳米管催化剂及等离子体激元
特長
- 通过改变电容器的容量,可以自由选择纳米粒子的粒径约1.5 nm~6nm
- 任何导电材料(靶)都可以等离子体化
*靶比电阻0.01欧姆或更小 - 通过改变气氛,可以很容易地生成氧化物和氮化物
- 被承载的纳米粒子与湿式相比,显示了高活性的催化效果
仕様
型式 | APD-S | APD-P |
---|---|---|
样品尺寸 | 基板 2英寸 |
粉末 试样容器尺寸(内尺寸)φ95mm×高30mm带搅拌机构 |
标准气相沉积源数 | 1 | 1 |
APD-P(粉末承载模型)
APD-S(衬底沉积模型)
铁碳多层膜
由此可知,比例尺层压5纳米,铁(黑色部分)层压约1.5纳米。此时的速率约为0.075 nm/脉冲,因为成膜时间为20次1.5 nm。
由此可知,比例尺层压5纳米,铁(黑色部分)层压约1.5纳米。此时的速率约为0.075 nm/脉冲,因为成膜时间为20次1.5 nm。
原理
动作图像
在施加高电位的靶上产生电弧后,储存在电容器中的电荷以脉冲方式瞬时放电,使靶材料成为等离子体,使电离的气相沉积粒子附着在衬底上。
5个特长
- 通过改变电容器的电容,纳米粒子的粒径可以自由选择约1.5 nm至6 nm。
- 任何导电材料(靶)都可以等离子体化。
*靶比电阻0.01欧姆或更小 - 通过改变气氛,可以很容易地生成氧化物和氮化物。当石墨在H2气体中放电时,它被转化为UNCD(超微晶金刚石)。
- 与湿式催化剂相比,本装置携带的纳米颗粒表现出更高的催化活性。
- APD-P型号携带粉末。APD-S型号由2in板承载。
※1、3、4については文献に依存します。
通过电弧等离子法负载在CeO2上的Pt及Pd催化剂,与传统湿法制备的催化剂相比,CO氧化活性更高
中所述修改相应参数的值。
引用文献:产业技术综合研究所环境化学技术研究部门藤谷忠博先生发表论文
引用文献:产业技术综合研究所环境化学技术研究部门藤谷忠博先生发表论文
电容器容量与纳米粒子形状的关系
碳粉载Pt TEM图像
引用文献:産業技術総合研究所 環境化学技術研究部門 藤谷忠博様発表論文
能量的差异对纳米粒子的生成和功能有很大的贡献(图表的纵轴是相对值,因此没有单位)
引用文献:电弧等离子体J.Apply.Phys.101(2007)043304 溅射J.Apply.Phys.35(1964)1819
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