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( r. p4 k( i8 O7 ~<title>本文介绍了一种用Sol</title>6 n9 G6 w! p0 u
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$ i" T# v, ^& p4 N 摘要：</b>随着对碳纳米管研究的不断深入，对碳纳米管的应用研究越来越受到人们的重视。通过分析碳纳米管的物理特性，对碳纳米管的应用前景进行了广泛的探索。CVD方法是制备大面积碳纳米管阵列的常用方法，我们着重介绍了碳纳米管在CVD方法生长初期的自组装微结构特点。在此基础上，讨论了碳纳米管阵列的生长机理和选择性生长现象。基于此现象，我们制备出了碳纳米管多维结构，并将在众多的领域具有广泛的应用前景。</span></font></td>1 X3 @; p- G, j
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, R3 d4 e; g# e+ h! n6 Q- atext-autospace:none"><b style="mso-bidi-font-weight:normal"><font size="2"><span lang="EN-US" style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Abstract:</span></font></b><font size="2"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;
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5 h" r# J6 P2 D* B( j- O0 efont-family Y101 ZKLHO2-102;mso-bidi-font-familyY101 ZKLHO2-102;mso-font-kerning:3 g+ C: \0 v, P0 |' `2 ^+ s, ^
/ h: k( o8 m( [) r( P1 U, h0pt"> The application of carbon nanotube has attracted a lot of attention with
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unique physical properties, its future application is discussed in detail.
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0 I2 S u3 Q5 Z4 N: ~4 \8 Q Chemical vapor deposition (CVD) is an economic way to grow carbon
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$ T4 M R: v' V( R4 f it can be understood that the <span style="mso-bidi-font-weight:bold">2D-3D
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structures of CNTs can be fabricated by this self-selective growth ' I# P/ ]$ E" K0 K" B' @3 r' M
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<font size="2"><b style="mso-bidi-font-weight:normal"><span lang="EN-US" style="font-family: DY101 ZKLHO2-102; mso-fareast-font-family: 宋体; mso-bidi-font-family: DY101 ZKLHO2-102; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Key
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g1 `3 N- i* V: Z! d. u nanotubes; self-organization; 2D-3D structures</span></font>& l4 l8 V, ^2 I# S7 S
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" v/ J# S0 M+ Y+ Omso-char-indent-count:1.5;mso-char-indent-size:12.0pt;line-height:150%;( `4 i9 C! z3 G7 H9 e2 B( H: x, U
, z: Y* M8 M$ j& b, ?" O6 vmso-layout-grid-align:none;text-autospace:none"><font size="2"><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">自从</span><span lang="EN-US" style="mso-font-kerning: 0pt">1991</span><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">年碳纳米管被发现以来，科研人员就对它投入了极大的关注。在充分认识碳纳米管各种特性的基础上，人们也在不断地探索碳纳米管在实际中的应用</span><sup><span lang="EN-US" style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">[1-4]</span></sup><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">。研究表明，碳纳米管在电学、磁学、力学、热学以及物理化学方面具有独特的性能，因而在纳米电子学、纳米机械系统、电子场致发射、电磁吸收、传感器、</span><span lang="EN-US" style="mso-font-kerning: 0pt">STM</span><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">探针、催化、探测生物细胞用电极及其他领域具有广泛的应用前景</span><sup><span lang="EN-US" style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">[5-10]</span></sup><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">。</span><span style="font-family: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">这些应用的必要前提条件在于对碳纳米管生长的大面积可控生长，近年来许多研究集中于这一方面</span><sup><span lang="EN-US">[6,11]</span></sup><span style="font-family: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">。</span><span lang="EN-US"><o:p>
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mso-layout-grid-align:none;text-autospace:none"><font size="2"><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">目前，可以通过化学气相沉积</span><span lang="EN-US" style="mso-font-kerning: 0pt">(CVD)</span><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">方法碳纳米管在平面基底上生长碳纳米管。在反应中，过渡金属元素颗粒作为催化剂，碳氢化合物作为碳源。通过这种方法，可以生长出大面积、排列整齐、分不均匀的碳纳米管阵列。这种碳纳米管阵列在储氢、场致发射、探针等方面有重要用途。</span><span lang="EN-US" style="mso-font-kerning: 0pt">CVD</span><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">方法中的重要一种是利用二甲苯<span lang="EN-US">(</span></span><span lang="EN-US" style="mso-font-kerning: 0pt">C<sub>8</sub>H<sub>10</sub>)</span><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">和二茂铁<span lang="EN-US">(</span></span><span lang="EN-US" style="mso-font-kerning: 0pt">Fe(C<sub>5</sub>H<sub>5</sub>)<sub>2</sub>)</span><span style="font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">制备碳纳米管，通过控制二者的比例可以实现对其生长模式的控制；通过对反应机理的研究，进而可以对碳纳米管的生长位置进行控制，打到选择性生长和多维生长的目的。<span lang="EN-US"><o:p>
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发表于 2006-8-24 01:17:31
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