On the Presence of Carbon Nanotubes During Streaming Potential Measurements in Microfluidics

2005 ◽  
Author(s):  
Shallu Bhalla ◽  
Fuzhi Lu ◽  
Ali Mansouri ◽  
Jinan Chai ◽  
Daniel Y. Kwok
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Streaming Potential ◽  
Contact Angles ◽  
Single Wall Carbon Nanotubes ◽  
Streaming Potentials ◽  
The Past ◽  
Pmma Surface ◽  
Surface Modified ◽  
Scanning Electron

Alignment of carbon nanotubes (CNTs) has been studied in details for the past decades. In this paper, we examine the presence of single wall carbon nanotubes on experimental microfluidic systems during streaming potential measurements. The PMMA surface modified by CNTs has been characterized by high resolution scanning electron microscope (SEM), contact angles and streaming potential measurements. Preliminary results demonstrate clearly the effect of CNTs on microfluidic experiments in terms of streaming potentials.

High-Resolution, Low-Voltage SEM of Cell Wall Regeneration of Yeast Shizosaccharomyces Pombe Protoplasts

1988 ◽  
Vol 46 ◽  
pp. 208-211
Author(s):  
M. Osumi ◽  
N. Yamada ◽  
T. Nagatani
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Low Voltage ◽  
Cell Wall Regeneration ◽  
The Past ◽  
The Poor ◽  
Probe Size ◽  
Beam Damage ◽  
Biological Field ◽  
Scanning Electron

Even though many early workers had suggested the use of lower voltages to increase topographic contrast and to reduce specimen charging and beam damage, we did not usually operate in the conventional scanning electron microscope at low voltage because of the poor resolution, especially of bioligical specimens. However, the development of the “in-lens” field emission scanning electron microscope (FESEM) has led to marked inprovement in resolution, especially in the range of 1-5 kV, within the past year. The probe size has been cumulated to be 0.7nm in diameter at 30kV and about 3nm at 1kV. We have been trying to develop techniques to use this in-lens FESEM at low voltage (LVSEM) for direct observation of totally uncoated biological specimens and have developed the LVSEM method for the biological field.

Effect of Functionalized MWCNT on the Mechanical and Dielectric Properties of PMMA Nanocomposites

2018 ◽  
Vol 18 (06) ◽  
pp. 1850035
Author(s):  
Punyapriya Mishra ◽  
Narasingh Deep ◽  
Sagarika Pradhan ◽  
Vikram G. Kamble
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Dielectric Constant ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Dielectric Properties ◽  
Conductive Polymer ◽  
Mechanical Tests ◽  
Surface Structures ◽  
Scanning Electron

Carbon nanotubes (CNTs) are widely explained in fundamental blocks of nanotechnology. These CNTs exhibit much greater tensile strength than steel, even almost similar to copper, but they have higher ability to carry much higher currents, they seem to be a magical material with all these mentioned properties. In this paper, an attempt has been made to incorporate this wonder material, CNT, (with varying percentages) in polymeric matrix (Poly methyl methacrylate (PMMA)) to create a new conductive polymer composite. Various mechanical tests were carried out to evaluate its mechanical properties. The dielectric properties such as dielectric loss and dielectric constant were evaluated with the reference of temperature and frequency. The surface structures were analyzed by Scanning Electron Microscope (SEM).

Highly sensitive compression sensors using three-dimensional printed polydimethylsiloxane/carbon nanotube nanocomposites

2019 ◽  
Vol 30 (8) ◽  
pp. 1216-1224 ◽  
Author(s):  
Mohammad Charara ◽  
Mohammad Abshirini ◽  
Mrinal C Saha ◽  
M Cengiz Altan ◽  
Yingtao Liu
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Carbon Nanotube ◽  
Scanning Electron Microscope ◽  
Three Dimensional ◽  
Multi Walled Carbon Nanotube ◽  
Highly Sensitive ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

This article presents three-dimensional printed and highly sensitive polydimethylsiloxane/multi-walled carbon nanotube sensors for compressive strain and pressure measurements. An electrically conductive polydimethylsiloxane/multi-walled carbon nanotube nanocomposite is developed to three-dimensional print compression sensors in a freestanding and layer-by-layer manner. The dispersion of multi-walled carbon nanotubes in polydimethylsiloxane allows the uncured nanocomposite to stand freely without any support throughout the printing process. The cross section of the compression sensors is examined under scanning electron microscope to identify the microstructure of nanocomposites, revealing good dispersion of multi-walled carbon nanotubes within the polydimethylsiloxane matrix. The sensor’s sensitivity was characterized under cyclic compression loading at various max strains, showing an especially high sensitivity at lower strains. The sensing capability of the three-dimensional printed nanocomposites shows minimum variation at various applied strain rates, indicating its versatile potential in a wide range of applications. Cyclic tests under compressive loading for over 8 h demonstrate that the long-term sensing performance is consistent. Finally, in situ micromechanical compressive tests under scanning electron microscope validated the sensor’s piezoresistive mechanism, showing the rearrangement, reorientation, and bending of the multi-walled carbon nanotubes under compressive loads, were the main reasons that lead to the piezoresistive sensing capabilities in the three-dimensional printed nanocomposites.

Damping Properties of Cups-Stacked Carbon Nanotubes (CSCNTs)/RTM6 Composites

2012 ◽  
Vol 535-537 ◽  
pp. 210-213
Author(s):  
Yan Liu ◽  
Rui Feng Li ◽  
Hua Xin Peng ◽  
Andy Limmack ◽  
Zhi Wu Han
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Fracture Surface ◽  
Resin System ◽  
Damping Properties ◽  
Mechanical Behaviors ◽  
Epoxy Nanocomposites ◽  
Epoxy Resin System ◽  
Measured Effect ◽  
Scanning Electron

Carbon nanotubes have better physical and mechanical behaviors than the traditional materials, in this study cups-stacked carbon nanotubes (CSCNTs) were filled into epoxy nancomposites to fabricate CSCNTs/epoxy nanocomposites. RTM6 was used by epoxy resin system. The cups-stacked carbon nanotubes (CSCNTs) were dispersed into the RTM6 matrix. In this study, damping properties of the CSCNTs/RTM6 were measured; effect of different weight percentages of the CSCNTs was investigated. And the morphologies of fracture surface of CSCNTs/epoxy nanocomposites were observed by scanning electron microscope (SEM); damping behaviors of the nanocomposites were studied by DMA tester at frequency domain.

scholarly journals Electron Beam Irradiation Induced Multiwalled Carbon Nanotubes Fusion inside SEM

Scanning ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Daming Shen ◽  
Donglei Chen ◽  
Zhan Yang ◽  
Huicong Liu ◽  
Tao Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Beam ◽  
Electron Microscope ◽  
Multiwalled Carbon Nanotubes ◽  
Electron Beam Irradiation ◽  
Tensile Force ◽  
Beam Irradiation ◽  
Multiwalled Carbon ◽  
Near Future ◽  
Scanning Electron

This paper reported a method of multiwalled carbon nanotubes (MWCNTs) fusion inside a scanning electron microscope (SEM). A CNT was picked up by nanorobotics manipulator system which was constructed in SEM with 21 DOFs and 1 nm resolution. The CNT was picked up and placed on two manipulators. The tensile force was 140 nN when the CNT was pulled into two parts. Then, two parts of the CNT were connected to each other by two manipulators. The adhered force between two parts was measured to be about 20 nN. When the two parts of CNT were connected again, the contact area was fused by focused electron beam irradiation for 3 minutes. The tensile force of the junction was measured to be about 100 nN. However, after fusion, the tensile force was five times larger than the tensile force connected only by van der Waals force. This force was 70 percent of the tensile force before pulling out of CNTs. The results revealed that the electron beam irradiation was a promising method for CNT fusion. We hope this technology will be applied to nanoelectronics in the near future.

Nanomanipulator-assisted fabrication and characterization of carbon nanotubes inside scanning electron microscope

Micron ◽  
2005 ◽  
Vol 36 (5) ◽  
pp. 471-476 ◽  
Author(s):  
Seong Chu Lim ◽  
Keun Soo Kim ◽  
Im Bok Lee ◽  
Seung Yol Jeong ◽  
Shinje Cho ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Fabrication And Characterization ◽  
Scanning Electron

Scanning Electron Microscope Evaluation of the Poly(vinylidene fluoride)/Multiple-Walled Carbon Nanotubes—Metal Oxides Nanocomposites

2018 ◽  
Vol 7 (3) ◽  
pp. 333-337
Author(s):  
Esther Lorrayne Machado Pereira ◽  
Adriana de Souza Medeiros Batista ◽  
Fabíola A. S. Ribeiro ◽  
Adelina P. Soares ◽  
Arno H. Oliveira ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Metal Oxides ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

Synthetic control over the structure and symmetry of carbon nanotubes: Towards biomedical applications

2011 ◽  
Vol 1297 ◽  
Author(s):  
Michael S. Lowry ◽  
Alfredo Rayms-Keller ◽  
Karen J. Long ◽  
Francisco Santiago ◽  
Victor H. Gehman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Vapor Deposition ◽  
Biomedical Applications ◽  
Chemical Vapor ◽  
Synthetic Control ◽  
Growth Site ◽  
Unique Chemical ◽  
Scanning Electron

ABSTRACTCarbon nanotubes (CNTs) are appealing materials for biomedical applications due to their unique chemical, electrical and mechanical properties. The emphasis of the present work is on controlling the structure and symmetry of carbon nanotubes by imposing an applied stress at the CNT growth site. CNTs were grown under these conditions using standard chemical vapor deposition (CVD) techniques and were subsequently characterized with a scanning electron microscope; the methodology and implications of this approach are discussed herein.

Photovoltaic properties of multi walled carbon nanotubes - poly(3-octathiophene) conducting polymer blends structures

2013 ◽  
Vol 1493 ◽  
pp. 139-144 ◽  
Author(s):  
Punya A. Basnayaka ◽  
Pedro Villalba ◽  
Manoj K. Ram ◽  
Lee Stefanakos ◽  
Ashok Kumar
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Conducting Polymer ◽  
Photoelectrochemical Cell ◽  
Photovoltaic Properties ◽  
Multi Wall Carbon Nanotubes ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

AbstractIn the present study, we have studied photoelectrochemical properties of poly(3-octathiophene) (P3OT), blending with multi-wall carbon nanotubes (MWCNTs). P3OT blended with MWCNTs was characterized using Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), Raman spectroscope, and Cyclic Voltammetry (CV) techniques, respectively. The photoelectrochemical current of the MWCNs-P3OT based cell under illumination was investigated by applying a voltage. The blend consisting of 10% MWCNTs in P3OT gave the promising photocurrent in 0.2 M tetra-butyl-ammonium-tetrafluoroborate (TBATFB), electrolyte. Experimental results indicate that photocurrent obtained from MWCNT-P3OT was three times higher than simple P3OT-based conducting polymer. The electrochemical responses of MWCNT-P3OT films in different electrolytes such as 0.2M TBATFB, 0.2 M LiClO4, 1 M H2SO4 and 0.2 M LiBF6 were investigated for comparative photocurrent properties of the photoelectrochemical cell.

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