Name: fabrication, densification, and replica molding of 3d carbon nanotube microstructures
Uploaded: 2012-07-02T08:01:00
Description: Watch this Scientific Journal Video about Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures at JoVE.com

इस अनुसंधान के राष्ट्रीय विज्ञान फाउंडेशन (CMMI 0,927,634) की nanomanufacturing कार्यक्रम के द्वारा समर्थित किया गया. Davor Copic भाग में मिशिगन विश्वविद्यालय में Rackham मेरिट फैलोशिप कार्यक्रम के द्वारा समर्थित किया गया. समेह Tawfick Rackham predoctoral फैलोशिप से आंशिक समर्थन मानता. फ़्लैंडर्स (FWO) - माइकल डी Volder के वैज्ञानिक अनुसंधान के लिए बेल्जियम फंड द्वारा समर्थित किया गया था. Microfabrication Lurie Nanofabrication (LNF) के सुविधा है, जो राष्ट्रीय नैनो इंफ्रास्ट्रक्चर नेटवर्क का एक सदस्य है पर प्रदर्शन किया था, और इलेक्ट्रॉन माइक्रोस्कोपी मिशिगन इलेक्ट्रॉन Microbeam विश्लेषण प्रयोगशाला (EMAL) में प्रदर्शन किया था.

1. उत्प्रेरक patterning <ol><li> एक 3000Å ​​मोटी सिलिकॉन डाइऑक्साइड परत के साथ कम से कम एक पक्ष के साथ पॉलिश (100) सिलिकॉन वफ़र, मोल. वैकल्पिक रूप से, आप एक नंगे सिलिकॉन वफ़र अधिग्रहण और वफ़र के पर 3000Å ​​सिलिकॉन डाइऑक्साइड ?...

<ol>
	<li>Xia, Y. N., Whitesides, G. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Soft+lithography.">Soft lithography.</a> Annual Review of Materials Science. 28, 153-184 (1998).</li><li>Xia, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Replica+molding+using+polymeric+materials:+A+practical+step+toward+nanomanufacturing.">Replica molding using polymeric materials: A practical step toward nanomanufacturing.</a> Advanced Materials. 9, 147-149 (1997).</li><li>Tasis, D., Tagmatarchis, N., Bianco, A., Prato, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chemistry+of+Carbon+Nanotubes.">Chemistry of Carbon Nanotubes.</a> Chemical Reviews. 106, 1105-1136 (2006).</li><li>De Volder, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Diverse+3D+Microarchitectures+Made+by+Capillary+Forming+of+Carbon+Nanotubes.">Diverse 3D Microarchitectures Made by Capillary Forming of Carbon Nanotubes.</a> Advanced Materials. 22, 4384-4389 (2010).</li><li>Copic, D., Park, S. J., Tawfick, S., De Volder, M. F. L., Hart, A. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fabrication+of+high-aspect-ratio+polymer+microstructures+and+hierarchical+textures+using+carbon+nanotube+composite+master+molds.">Fabrication of high-aspect-ratio polymer microstructures and hierarchical textures using carbon nanotube composite master molds.</a> Lab on a Chip. 11, 1831-1837 (2011).</li><li>De Volder, M. F. L., Park, S. J., Tawfick, S. H., Vidaud, D. O., Hart, A. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fabrication+and+electrical+integration+of+robust+carbon+nanotube+micropillars+by+self-directed+elastocapillary+densification.">Fabrication and electrical integration of robust carbon nanotube micropillars by self-directed elastocapillary densification.</a> Journal of Micromechanics and Microengineering. 21, 045033-04 (2011).</li><li>Zhao, Z. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bending+of+nanoscale+filament+assemblies+by+elastocapillary+densification.">Bending of nanoscale filament assemblies by elastocapillary densification.</a> Physical Review E. 82, 041605 (2010).</li><li>De Volder, M. F. L., Vidaud, D. O., Meshot, E. R., Tawfick, S., Hart, A. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Self-similar+organization+of+arrays+of+individual+carbon+nanotubes+and+carbon+nanotube+micropillars.">Self-similar organization of arrays of individual carbon nanotubes and carbon nanotube micropillars.</a> Microelectronic Engineering. 87, 1233-1238 (2010).</li><li>Nessim, G. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tuning+of+Vertically-Aligned+Carbon+Nanotube+Diameter+and+Areal+Density+through+Catalyst+Pre-Treatment.">Tuning of Vertically-Aligned Carbon Nanotube Diameter and Areal Density through Catalyst Pre-Treatment.</a> Nano Letters. 8, 3587-3593 (2008).</li><li>Pokroy, B., Epstein, A. K., Persson-Gulda, M. C. M., Aizenberg, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fabrication+of+Bioinspired+Actuated+Nanostructures+with+Arbitrary+Geometry+and+Stiffness.">Fabrication of Bioinspired Actuated Nanostructures with Arbitrary Geometry and Stiffness.</a> Advanced Materials. 21, 463-469 (2009).</li></ol>

Lithographic patterning और CNT के उत्प्रेरक substrates की तैयारी सरल और repeatable है, तथापि, कैसे ऊंचाई और CNT के जंगलों के घनत्व परिवेश नमी और विकास ट्यूब की हालत से प्रभावित कर रहे हैं संगत CNT के विकास को प्राप्त करने के लिए सावधान ध्य?...

<table border="1"><tbody><tr><td> अभिकर्मक का नाम </td><td> कंपनी </td><td> सूचीपत्र संख्या </td><td> टिप्पणियाँ </td></tr><tr><td> 4 &quot;व्यास &lt;100&gt; सिलिकॉन 2 SIO (300 एनएम) के साथ लेपित वेफर्स </td><td> सिलिकॉन क्वेस्ट </td><td> रिवाज </td><td></td></tr><tr><td> सकारात्मक photoresist </td><td> MicroChem </td><td> 220-3.0 SPR </td><td></td></tr><tr><td> Hexamethyldisilizane (HMDS) </td><td> MicroChem </td><td></td><td></td></tr><tr><td> विकासक </td><td> AZ इलेक्ट्रॉनिक सामग्री संयुक्त राज्य अमेरिका कॉर्प </td><td> प्रथम से अंतिम अक्षर तक 300 MIF </td><td></td></tr><tr><td> Sputtering प्रणाली </td><td> कर्ट जे Lesker </td><td> 18 लैब </td><td> उत्प्रेरक बयान के लिए sputtering प्रणाली </td></tr><tr><td> थर्मो फिशर Minimite के </td><td&gt; फिशर साइंटिफिक </td><td> TF55030A </td><td> CNT के विकास के लिए ट्यूब भट्ठी </td></tr><tr><td> क्वार्ट्ज ट्यूब </td><td> तकनीकी ग्लास उत्पाद </td><td> रिवाज </td><td> 22 मिमी × आईडी 25 मिमी आयुध डिपो 30 &quot;लंबाई </td></tr><tr><td> हीलियम गैस </td><td> PurityPlus </td><td> वह (300 PrePurified) </td><td></td></tr><tr><td> हाइड्रोजन गैस </td><td> PurityPlus </td><td> एच 2 (300 PrePurified) </td><td> UHP </td></tr><tr><td> Ethylene गैस </td><td> PurityPlus </td><td> 2 सी एच (300 PrePurified, 4) </td><td> UHP </td></tr><tr><td> को छिद्रित एल्यूमीनियम शीट </td><td> McMaster - कार्र </td><td> 9232T221 </td><td> Densification बीकर ऊपर नमूना आयोजित करने के लिए </td></tr><tr><td> यूवी बाढ़ दीपक </td><td> Dymax </td><td> 2000 मॉडल </td><td></td></tr><tr><td> SU - 8 २००२ </td><td> MicroChem </td><td> SU - 8 २००२ </td><td></td></tr><tr><td> Polydimethylsiloxane (PDMS) </td><td> डॉव Corning </td><td> Sylgard 184 सिलिकॉन elastomer किट </td><td></td></tr></tbody></table>

fabrication, densification, and replica molding of 3d carbon nanotube microstructures

The introduction of new materials and processes to microfabrication has, in large part, enabled many important advances in microsystems, lab-on-a-chip devices, and their applications. In particular, capabilities for cost-effective fabrication of polymer microstructures were transformed by the advent of soft lithography and other micromolding techniques 1, 2, and this led a revolution in applications of microfabrication to biomedical engineering and biology. Nevertheless, it remains challenging to fabricate microstructures with well-defined nanoscale surface textures, and to fabricate arbitrary 3D shapes at the micro-scale. Robustness of master molds and maintenance of shape integrity is especially important to achieve high fidelity replication of complex structures and preserving their nanoscale surface texture. The combination of hierarchical textures, and heterogeneous shapes, is a profound challenge to existing microfabrication methods that largely rely upon top-down etching using fixed mask templates. On the other hand, the bottom-up synthesis of nanostructures such as nanotubes and nanowires can offer new capabilities to microfabrication, in particular by taking advantage of the collective self-organization of nanostructures, and local control of their growth behavior with respect to microfabricated patterns. 
Our goal is to introduce vertically aligned carbon nanotubes (CNTs), which we refer to as CNT "forests", as a new microfabrication material. We present details of a suite of related methods recently developed by our group: fabrication of CNT forest microstructures by thermal CVD from lithographically patterned catalyst thin films; self-directed elastocapillary densification of CNT microstructures; and replica molding of polymer microstructures using CNT composite master molds. In particular, our work shows that self-directed capillary densification ("capillary forming"), which is performed by condensation of a solvent onto the substrate with CNT microstructures, significantly increases the packing density of CNTs. This process enables directed transformation of vertical CNT microstructures into straight, inclined, and twisted shapes, which have robust mechanical properties exceeding those of typical microfabrication polymers. This in turn enables formation of nanocomposite CNT master molds by capillary-driven infiltration of polymers. The replica structures exhibit the anisotropic nanoscale texture of the aligned CNTs, and can have walls with sub-micron thickness and aspect ratios exceeding 50:1. Integration of CNT microstructures in fabrication offers further opportunity to exploit the electrical and thermal properties of CNTs, and diverse capabilities for chemical and biochemical functionalization 3.

Watch this Scientific Journal Video about Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures at JoVE.com

Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures

हम खड़ी गठबंधन कार्बन नैनोट्यूब (CNTs), और संगठित nanoscale सतह बनावट के साथ बहुलक microstructures के उत्पादन के लिए उनके गुरु molds के रूप में उपयोग के नमूनों की microstructures निर्माण के लिए तरीके प्रस्तुत करते हैं. CNT के जंगलों विलायक का संक्षेपण द्वारा सब्सट्रेट है, जो काफी उनके पैकिंग घनत्व बढ़ जाती है और 3 डी आकार का गठन आत्म निर्देशित सक्षम बनाता है पर densified कर रहे हैं.

3 डी कार्बन नैनोट्यूब Microstructures के निर्माण, densification, और प्रतिकृति मोल्डिंग

The introduction of new materials and processes to microfabrication has, in large part, enabled many important advances in microsystems, lab-on-a-chip ...

Research

JoVE Journal

Engineering

Dry Oxidation and Vacuum Annealing Treatments for Tuning the Wetting Properties of Carbon Nanotube Arrays

सूखी ऑक्सीकरण और वैक्यूम कार्बन नैनोट्यूब arrays के गीला गुण ट्यूनिंग के लिए उपचार एनीलिंग

In this article, we describe a simple method to reversibly  tune the wetting properties of vertically aligned carbon nanotube (CNT) arrays.  Here, CNT ...

Synthesis and Functionalization of Nitrogen-doped Carbon Nanotube Cups with Gold Nanoparticles as Cork Stoppers

कॉर्क डाट के रूप में सोने के नैनोकणों के साथ नाइट्रोजन डाल दिया गया कार्बन नैनोट्यूब कप के संश्लेषण और functionalization

Nitrogen-doped carbon  nanotubes consist of many cup-shaped graphitic compartments termed as  nitrogen-doped carbon nanotube cups (NCNCs).  These ...

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

डिजिटल फ्रिंज प्रक्षेपण तकनीक के साथ उच्च संकल्प, उच्च गति, तीन आयामी वीडियो इमेजिंग

Digital fringe projection (DFP) techniques provide dense 3D measurements of dynamically changing surfaces.&#160;Like the human eyes and brain, DFP uses ...

Process of Making Three-dimensional Microstructures using Vaporization of a Sacrificial Component

एक बलि घटक का वाष्पीकरण का उपयोग कर तीन आयामी Microstructures बनाने की प्रक्रिया

Vascular structures in natural systems are able to provide high mass transport through high surface areas and optimized structure. Few synthetic material ...

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

मिलकर कार्बनिक सौर कोशिकाओं में एक Ionically सुरक्षा पूर्ण कार्बन नैनोट्यूब आम कैथोड का उत्पादन के लिए परिवेश विधि

A method of fabricating organic photovoltaic (OPV) tandems that requires no vacuum processing is presented. These devices are comprised of two ...

Fabrication of Low Temperature Carbon Nanotube Vertical Interconnects Compatible with Semiconductor Technology

सेमीकंडक्टर तकनीक के साथ संगत कम तापमान कार्बन नैनोट्यूब कार्यक्षेत्र interconnects के निर्माण

We demonstrate a method for the low temperature growth (350 &#176;C) of vertically-aligned carbon nanotubes (CNT) bundles on electrically conductive ...

Fabrication and Characterization of Superconducting Resonators

निर्माण और अतिचालक resonators की विशेषता

Superconducting microwave resonators are of interest for a wide range of applications, including for their use as microwave kinetic inductance detectors ...

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

ब्लास्ट फर्नेस लावा की दो-तरफा मूल्यसिथरीकरण: उपजी कैल्शियम कार्बोनेट और zeolitic भारी धातु Adsorbent के संश्लेषण

The aim of this work is to present a zero-waste process for storing CO2 in a stable and benign mineral form while producing zeolitic minerals with ...

Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy

कार्बन नैनोट्यूब वन प्रेसिजन मिलिंग कम दबाव स्कैनिंग इलेक्ट्रॉन माइक्रोस्कोपी का उपयोग

A nanoscale fabrication technique appropriate for milling carbon nanotube (CNT) forests is described. The technique utilizes an environmental scanning ...

High Temperature Fabrication of Nanostructured Yttria-Stabilized-Zirconia (YSZ) Scaffolds by In Situ Carbon Templating Xerogels

High Temperature Fabrication of Nanostructured Yttria-Stabilized-Zirconia YSZ Scaffolds by In Situ Carbon Templating Xerogels

द्वारा Nanostructured yttria स्थिर-YSZ (zirconia) scaffolds के उच्च तापमान निर्माण<em&gt; सीटू</em&gt; कार्बन Templating xerogels

We demonstrate a method for the high temperature fabrication of porous, nanostructured yttria-stabilized-zirconia (YSZ, 8 mol% yttria - 92 mol% zirconia) ...