Name: functionalization of single-walled carbon nanotubes with thermo-reversible block copolymers and characterization by small-angle neutron scattering
Uploaded: 2016-06-01T13:00:00
Description: Watch this Scientific Journal Video about Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering at JoVE.com

The Research at Oak Ridge National Laboratory's Spallation Neutron Source and Center for Nanophase Materials Sciences was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. The author, Zhe Zhang, gratefully acknowledges the financial support from J&#252;lich Center for Neutron Science, Research center J&#252;lich.

참고 :이 프로토콜은 나노 물질의 취급에 특별한주의가 필요합니다. AS-구입 단층 카본 나노 튜브 (SWNT로)을 미세 분말 형태로 존재하며, 따라서 이들은 수용액을 분산시키기 전에 나노 유해 물질로 간주되어야한다. 물질 안전 보건 자료 (MSDS)에 설명 된 적절한 안전 장비를 사용하십시오. 폴록 사머 407 / SWNT 수성 현탁액 1. 준비 주 : 사용 된 블록 공중 합체?...

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SANS 및 AFM 측정 SWNT를 성공적 드 번들로 개별적으로 폴록 사머 407 트리 블록 공중 합체를 사용하여 수성 용액에 분산 한 것으로 나타났다. 이 시료 제조 방법에있어서, 초 원심 분리, 초음파 처리는 최종 현탁액의 특성을 결정하는 중요한 단계이다. 용액을 함께 묶을 코팅의 SWNT를 강제 단일 벽 탄소 나노 튜브 사이의 강한 상호 작용은, 블록 공중 합체와 개별 SWNT를 안정화 극복되어야한다. 적절하?...

탄소 나노 튜브는 나노 튜브에 마이크로 미터 크기의 흑연 시트를 압연에 의해 형성되는 원통 나노 입자이다. 때문에 특별한 기계적, 열적 및 전기적 특성 때문에, 탄소 나노 튜브는 광범위하게 자기 조립 된 나노 복합 재료에서의 치료 학적 및 바이오 센서 응용뿐만 아니라 나노 충전제의 기능성 나노 입자에 대한 새로운 후보로 연구되었다. 1-3 그러나, 그들의 가난한 용해도 및 일반적으로 사용되는 유기 및 수성 용매에 번들을 향한 강한 선호 생물학적 응용 프로그램에서 쉽고 환경 친화적 인 처리뿐만 아니라 발전을 방해. 따라서, 이러한 초 초음파 처리, 화학적 표면 개질, 및 계면 활성제와 블록 공중 합체를 사용하여 비 - 공유 작용으로서 작용의 다양한 방법은, 4-9의 CNT 표면을 수정하고 넓은 범위의 분 산성을 향상시키기 위해 개발되어왔다 용매. 비 공유 functiona물리적 표면 처리에 기초하여 사용 효율 방법은 극한 CNT 특성에 어떠한 표면 개질 의한 억제를 최소화 할 수 있기 때문에 특히. 유망한 견고한 전략으로 여겨진다 일자 10, 분산 효율을 향상시키기 위해 많은 노력이있어왔다 염기성 계면 활성제 (예를 들면, SDS, CTAB, NaDDBS), 7,11 양친 성 블록 공중 합체, 8 바이오 물질 (예, DNA), (12, 13) 및 합성 중합체를 포함한 분산 기능 제의 다양한 형태를 채용하여 비공유 기능화 방법 (예를 들면, 공액 폴리머, 방향족 폴리머). 14,15 PEO-PPO-PEO 중합체 개의 친수성 ​​폴리 (에틸렌 옥사이드)로 이루어지는 트리 블록 공중 합체의 종류 (PEO) 모두의 사슬을 공유 한 소수성 폴리 (프로필렌 옥사이드) 중심 (PPO) 체인에 결합 단부 가능성을 확장 할 수있다 비공유 기능화 된 탄소 나노 튜브의 응용 IN 수용액. 이러한 중합체는 PEO 의한 사슬의 최소 독성에 CNT의 표면뿐만 아니라, 수성 매질 및 기타 중합체 매트릭스 엄청난 생체 적합성을 나타내는 행뿐만 친화적 인 인터페이스를 제공한다. 이것은 의용 애플리케이션 중합체 코팅 탄소 나노 튜브의 이용뿐만 아니라 환경 분산의 넓은 범위에서 쉽게 가공을 용이하게한다. 12,16-17 게다가, 외부 자극에 대한 그들의 성 응답에 따라 이들 중합체의 풍부한 열역학적 상 동작이 가능 인트라 및 인터 입자 구조를 가역적으로 정밀하게 제어 할 수있는 스마트 블록 공중-CNT 혼성 나노 구조물의 제조. 18-21 여기서, 우리의 가변 밀봉 층과 CNT 계 하이브리드 나노 입자의 제조를위한 프로토콜을 제시 PEO105-PPO70-PEO105 (폴록 사머 407). 얻어진 구조는 소각 중성자 산란 (SANS)을 특징으로한다. 이 작품은부터 소개 할 것으로 예상된다전자 스마트 기능적 빌딩 블록의 개념 및 비 전문가가 쉽게 오크 리지 국립 연구소의 상세한 특성에 대한 블록 공중 합체 기능화 된 CNT 현탁액 및 사용 SANS를 준비하는 데 도움이.

<table border="0" cellpadding="0" cellspacing="0" width="634">
	<tbody>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">HiPco Single-walled carbon nanotubes</td>
			<td style="width:71px;">Unidym</td>
			<td style="width:119px;">P2771</td>
			<td style="width:228px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Pluronic F127</td>
			<td style="width:71px;">BASF</td>
			<td>9003-11-6</td>
			<td>Mw = 12.6 kg/mol</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">5-methylsalicylic acid</td>
			<td style="width:71px;">TCI America</td>
			<td>C0410</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Ultrasonic processor</td>
			<td style="width:71px;">Cole-Parmer</td>
			<td>ML-04714-52</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Sorvall 6 plus centrifuge</td>
			<td style="width:71px;">Thermo Scientific</td>
			<td align="right" style="width:119px;">46910</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Innova AFM&#160;</td>
			<td style="width:71px;">Bruker</td>
			<td style="width:119px;"></td>
			<td></td>
		</tr>
		<tr height="89">
			<td height="89" style="height:89px;width:216px;">Si-wafer</td>
			<td style="width:71px;">Silicon Quest International</td>
			<td style="width:119px;"></td>
			<td style="width:228px;">150 mm in diameter&#160; ; N type &#60;1-1-1&#62; cut ; 1-10 Ohm/cm ; Single-side polyshed (675 +- 25 um) ; Diced (12 mm x 12 mm)</td>
		</tr>
	</tbody>
</table>

functionalization of single-walled carbon nanotubes with thermo-reversible block copolymers and characterization by small-angle neutron scattering

We demonstrate a protocol for single-walled carbon nanotube functionalization using thermo-sensitive PEO-PPO-PEO triblock copolymers in an aqueous solution. In a carbon nanotube/PEO105-PPO70-PEO105 (poloxamer 407) aqueous solution, the amphiphilic poloxamer 407 adsorbs onto the carbon nanotube surfaces and self-assembles into continuous layers, driven by intermolecular interactions between constituent molecules. The addition of 5-methylsalicylic acid changes the self-assembled structure from spherical-micellar to a cylindrical morphology. The fabricated poloxamer 407/carbon nanotube hybrid particles exhibit thermo-responsive structural features so that the density and thickness of poloxamer 407 layers are also reversibly controllable by varying temperature. The detailed structural properties of the poloxamer 407/carbon nanotube particles in suspension can be characterized by small-angle neutron scattering experiments and model fit analyses. The distinct curve shapes of the scattering intensities depending on temperature control or addition of aromatic additives are well described by a modified core-shell cylinder model consisting of a carbon nanotube core cylinder, a hydrophobic shell, and a hydrated polymer layer. This method can provide a simple but efficient way for the fabrication and in-situ characterization of carbon nanotube-based nano particles with a structure-tunable encapsulation.

폴록 자머 407 코팅 된 SWNT 나노 막대 현탁액 중요한 두 과정으로 나누어 질 수있는 시료 전처리 과정 (도 4)을 사용하여 제조 하였다; 울트라 소니 케이션하고, 원심 분리를 이용하여 번들 집합체에서 개별적으로 안정화 된 단일 벽 탄소 나노 튜브의 분획 공정을 이용하여 SWNT 표면에 폴록 사머 407의 물리적 흡착 방법. <p class="jove_content" fo:keep-together.within-page=...

Watch this Scientific Journal Video about Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering at JoVE.com

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

A method for the functionalization of carbon nanotubes with structure-tunable polymeric encapsulation layers and structural characterization using small-angle neutron scattering is presented.

작은 각도 중성자 산란에 의한 열 가역적 블록 공중 합체 및 특성 단일 벽 탄소 나노 튜브의 기능화

We demonstrate a protocol for single-walled carbon nanotube functionalization using thermo-sensitive PEO-PPO-PEO triblock copolymers in an aqueous ...

Research

JoVE Journal

Chemistry

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance

템플릿 조정할 IR의 흡광도와 Plasmonic 골드 나노 튜브의 합성을 감독

A nearly parallel array of pores can be produced by anodizing aluminum foils in acidic environments1, 2. Applications of anodic aluminum oxide (AAO) ...

연구

화학

Transport of Surface-modified Carbon Nanotubes through a Soil Column

토양 칼럼을 통해 표면 개질 된 카본 나노 튜브의 운송

Carbon nanotubes (CNTs) are widely manufactured nanoparticles, which are being utilized in a number of consumer products, such as sporting goods, ...

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

합성, 특성 및 하이브리드 금 / CD 및 금 /은 ZnS 코어 / 쉘 나노 입자의 작용 화

Plasmonic nanoparticles are an attractive material for light harvesting applications due to their easily modified surface, high surface area and large ...

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

탄소 나노 튜브에 의해 안정화 내부 자기 조립 된 지질 입자의 용이 한 제조

We present a facile method to prepare nanostructured lipid particles stabilized by carbon nanotubes (CNTs). Single-walled (pristine) and multi-walled ...

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA

특성, 벤젠 폴리 카르 복실 산을 사용하여 발열 성 탄소의 정량 및 화합물 특정 동위 원소 분석 (BPCA)

Fire-derived, pyrogenic carbon (PyC), sometimes called black carbon (BC), is the carbonaceous solid residue of biomass and fossil fuel combustion, such as ...

Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties

향상된 전자 전도성 특성을 가진 철 - 도핑 된 알루미 노 실리케이트 나노 튜브의 합성 및 특성

The goal of the protocol is to synthesize Fe-doped aluminosilicate nanotubes of the imogolite type with the formula (OH)3Al2-xFexO3SiOH. Doping with Fe ...

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

중성자 산란을 사용 하 여 활용 된 중합체 젤의 구조에 조명 효과 모니터링

We demonstrate a protocol to effectively monitor the gelation process of a high concentration solution of conjugated polymer both in the presence and ...

Grafting Multiwalled Carbon Nanotubes with Polystyrene to Enable Self-Assembly and Anisotropic Patchiness

자기 집합에 있도록 폴리스 티 렌과 이방성 Patchiness Multiwalled 탄소 나노튜브를 접목

We demonstrate a straightforward protocol to graft pristine multiwalled carbon nanotubes (MWCNTs) with polystyrene (PS) chains at the sidewalls through a ...

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera

시간 해결 Photophysical 특성화 Triplet 수확 유기 화합물은 산소가 없는 환경을 사용 하 여는 iCCD 카메라

Here, we present a sensible method of the acquisition and analysis of time-resolved photoluminescence using an ultrafast iCCD camera. This system enables ...

DNA-magnetic Particle Binding Analysis by Dynamic and Electrophoretic Light Scattering

역동적이 고 전기 이동 산란 분석 바인딩 DNA-마그네틱 입자

Isolation of DNA using magnetic particles is a field of high importance in biotechnology and molecular biology research. This protocol describes the ...