A rapid synthesis of iron phosphate nanoparticles via surface-mediated spontaneous reaction for the growth of high-yield, single-walled carbon nanotubes.
A rapid synthesis of iron phosphate nanoparticles via surface-mediated spontaneous reaction for the growth of high-yield, single-walled carbon nanotubes.
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DOI：
10.1021/la051484l
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发表时间：
2005-08
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影响因子：
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通讯作者：
Hyun Jin Yang;H. Song;Hyun Joon Shin;H. Choi
中科院分区：
文献类型：
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作者：
Hyun Jin Yang;H. Song;Hyun Joon Shin;H. Choi
通过氯化铁和磷酸的简单室温自发反应，在羟基封端的SiO2/Si衬底上直接合成了具有窄粒径分布（平均粒径= 2.2 nm）的磷酸铁纳米颗粒。通过原子力显微镜（AFM）和拉曼光谱证实，采用热化学气相沉积（CVD）法从合成的磷酸铁纳米颗粒中高产率生长出单壁碳纳米管（SWNTs）。此外，三端，p型，纳米管网络场效应晶体管（FET）器件成功地制造使用合成的单壁碳纳米管通过光刻技术。Fe（III）离子在水介质中形成磷酸铁盐时溶解度降低是纳米颗粒形成的主要驱动力。系统的控制实验表明，反应溶液的表面性质，浓度和pH值在纳米粒子的形成中起着同样重要的作用。
The direct formation of iron phosphate nanoparticles on hydroxyl-terminated SiO(2)/Si substrates with a narrow size distribution (average diameter = 2.2 nm) is achieved by a simple room temperature spontaneous reaction of ferric chloride and phosphoric acid. Single-walled carbon nanotubes (SWNTs) are grown in high yield from the synthesized iron phosphate nanoparticles by the thermal chemical vapor deposition (CVD) method, as confirmed by atomic force microscopy (AFM) and Raman spectroscopy. Furthermore, three-terminal, p-type, nanotube network field effect transistor (FET) devices are successfully fabricated using the synthesized SWNTs via the photolithography technique. The reduced solubility of Fe(III) ions when they form iron phosphate salts in aqueous media is the main driving force for the nanoparticle formation. Systematic control experiments reveal that the surface property, concentration, and pH of the reaction solution play equally important roles in the formation of nanoparticles.