SKU: 77365314960

Graphitized Carboxyl MWNTs 30-50nm

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Description

Graphitized Carboxyl MWNTs 30-50nmProduct Name Name Grapheitized Carboxyl MWNTs 30 50nm Product Overview The CVD method for preparing carbon nanotubes is widely used because of its advantages such as mature method and high yield. However, the preparation of carbon nanotubes by CVD method often requires the introduction of a catalyst, and the nanotubes grow gradually along the radial and axial directions with the catalyst particle as the center. The difficulty of removing the catalyst

Product Name

Name :Grapheitized Carboxyl MWNTs  30-50nm


Product Overview

The CVD method for preparing carbon nanotubes is widely used because of its advantages such as mature method and high yield. However, the preparation of carbon nanotubes by CVD method often requires the introduction of a catalyst, and the nanotubes grow gradually along the radial and axial directions with the catalyst particle as the center. The difficulty of removing the catalyst has become an important factor restricting the purity of the carbon tube, which will limit the application of the carbon tube to a certain extent. Graphitized carbon tube is the ordinary carbon tube in the inert atmosphere of high temperature treatment, can effectively remove the catalyst and other impurities, effectively improve the purity of the carbon tube, reduce defects, effectively improve its microstructure, in order to obtain good electrical, thermal, mechanical and other properties. The higher the degree of graphitization, the better the crystallinity, thermal stability and electrical conductivity of the carbon nanotubes are generally better.


Technical Parameter

Color: Black

OD:/span>30-50 nm

ID:5-12nm

Purity:gt;99.9%

Length:/span><10um

SSA:gt;30 m2·g-1

-OH Content:.36 wt%


Product characteristics


High purity: Most of the metal impurities are removed under high temperature treatment of the carbon tube.

It has good flexibility and elasticity and can withstand large deformation without breaking. For example, in some micro-mechanical parts, complex movements can be achieved using their flexibility.

Electrical properties:

It has good electrical conductivity, and the electrical conductivity can be close to copper.

Exhibit unique quantum conductivity properties. For example, in nanoelectronic devices, their conductance characteristics contribute to precise current control.

Thermal properties:

The thermal conductivity is very high and can effectively conduct heat.

Good thermal stability, can still maintain the stability of structure and performance in high temperature environment. This makes it a potential application in highly efficient cooling materials, such as the cooling components of high-power electronic devices.

Chemical properties:

High chemical stability, not easy to react in most chemical environments.

The surface can be chemically modified to meet different application requirements. For example, it can be better dispersed in certain solvents or substrates through chemical modifications.

Optical properties:

It has unique optical absorption and emission characteristics in the near infrared and visible regions.

It can be used to make optical sensors and light-emitting devices.


Application Fields

Battery electrode: graphitized carbon nanotubes can be used as a conductive agent for lithium batteries to improve the conductivity and cycle life of the battery.

Composite materials: By adding graphitized carbon nanotubes to substrates such as polymers, metals or ceramics, composites with high strength, high electrical conductivity and high thermal conductivity can be prepared.

Electronic devices: Integrated circuits based on semiconductor graphitized carbon nanotubes and display backplane drivers are being developed.

Sensor parts: graphitized carbon nanotubes have the characteristics of high sensitivity and fast response, and can be used to prepare gas sensors, biosensors, etc.

Electric heater parts: Using the good electrical conductivity and electric heating conversion performance of graphitized carbon nanotubes, efficient electric heater parts can be prepared.


Related Information

Please e-mail for the detailed characterization data.

E-mail:[email protected]

 

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SKU: 77365314960

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4.8 ★★★★★
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Verified Purchase
Searching the Stars
Carnegie, US
★★★★★ 5
A Great Work on the Dynamics of the Human Condition
Format: Hardcover
Irvin Yalom, Professor Emeritus at Standford in psychiatry, has written a masterful book on the human condition (published in 1980). "Existential Psychotherapy" is singularly one of the best books I have ever read. Why? Yalom has combined 1) his intellectual insights in psychology with 2) his practical observations in therapy with 3) existential thought. He seeks to show that much of the anxiety we face as human beings, and seek comfort for in psychotherapy (or religion), originates from the existential facts of being a mortal, free being. He focuses on four main areas: death (our inner structure will go to nothing), freedom (we are forced to make momentous decisions without full information), isolation (we are alone in many fundamental ways) and meaninglessness (we don't have a clear picture of what it really means). From literature, psychology, philosophy and some theology (Tillich), Yalom has created a definitive text on what it means to open our eyes fully to our existential situation. It is not a depressive text, as the goal is to come to terms with our condition. And ironically, facing the truth of death, for example, makes life richer. This is much more than a self-help book, it is a philosophical-psychological masterpiece. I have a Ph.D. in the philosophy of religion and have published several articles in leading journals and don't give out the kind of praise I am giving here easily. It is one of the best books I have ever read, and I think a wide range of people would profit from it. Yet it's a difficult book, not an easy self-help read. But Yalom is such a clear writer that most readers could follow it. When he uses technical psychological or philosophical terms, he usually explains them. Otherwise, the dictionary must be used. This text would be helpful for people in the helping professions in giving an existential aspect to their work. Religious thinkers and those interested in philosophy should pick it up at any cost. Any educated person could profit from it greatly. It's a long text, and I had to break it up by carefully reading some from each of the main four parts simultaneously to get a view of the whole. It's a bit dry at times, but thoughtful, perceptive, educational in many fields, --it's ....wisdom literature....I can't think of a higher compliment.
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Reviewed in the United States on March 19, 2013
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Verified Purchase
David L. Pogge, Ph.D.
Lowell, US
★★★★★ 5
The best of its kind.
As a clinical psychologist who has been practicing, doing research on, and teaching assessment and therapy for more than 25 years I have encountered many books and many more articles and research papers on psychotherapy. While some have real value, most do little more than take up space and help the people who wrote them advance their careers. All too rarely one comes across a book that changes one's way of looking at things and helps one to approach this field in a new and qualitatively better fashion. Yalom's book on Existential Psychotherapy is one such book. I first read this when I was in graduate school in the early 1980's and just learning about psychotherapy, and about life. This book opened my eyes and gave me an over-arching way of thinking about myself, my patients, and the things that I was doing. Unlike most texts on therapy, it was not limited to the parochial "theoretical orientations" and mechanistic models of therapy technique that I was learning then and have seen proliferate ever since. Since this time I have re-read this book many times, and each time I have gotten more from it. Yalom tries to go through the collected wisdom of mankind, not just in the narrow world of scientific psychology, but in philosophy, art, and religion, to explain how everyone must face certain existential realities such a mortality, temporality, resonsibility and isolation, and how the struggle to face these basic issues underlies many of the symptoms and complaints that lead people to seek the help of mental health professionals. Unfortunately, as Yalom points out, all too often we fail to see these as such, and offer help in the form of superficial, pseudoscientific psychologizing, technical trivialities and medications that often do more harm than good. While, used humbly and wisely, these things are not without value, their value is often fatally limited by their failure to see the larger context of life and its challenges. Once having read and really thought about Yalom's book, that becomes much harder to do; and thereby inevitably enriches one's practice and one's life. Regardless what kinds of therapies and what kinds of patients one works with - or even if one's practice is limited primarily to assessment or research - this book provides a philosophical and conceptual bedrock that can inform and enrich what one does. I am so happy to see that this book is still in print, and I would encourage anyone who plans to make a living trying to be seriously involved in other people's lives to avail themselves of this book. It is a treasure and a masterpiece. I intend to us it in my classes this year and for as long as it remains in print.
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Reviewed in the United States on October 5, 2013
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Verified Purchase
Classical Fan
West Palm Beach, US
★★★★★ 5
Very Interesting and Well-Written
Format: Kindle
This is a very interesting and well-written book that discusses philosophy as well as psychology, while also providing numerous vignettes from actual cases, that demonstrate the implementation of the author's ideas. Highly recommended.
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Reviewed in the United States on February 9, 2024
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Pat
Houston, US
★★★★★ 5
This is a really great book.
Format: Hardcover
I am a layperson so those who read this review should consider that. I have read this book slowly, very slowly and as a layperson have found it to be so very, very enlightening. This material has such depth and there were sections that I read that caused me to put the book down and consider what I had just encountered. Life is not a simple journey especially when we pick up so much detritus on the way. For years, I knocked on so many variously colored doors - entering and finding myself wanting...not them, mind you, but myself. Reading this - pointed me to a gate that swung open to a garden area, albeit, very overgrown, untended. It is here now that I work - some of what I thought were weeds are not. Some of what I thought were flowers are not. I just want to be free and am willing to accept that responsibility. Thank you, Dr. Yalom....you sage of my generation.
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Reviewed in the United States on April 7, 2014
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drey c.
Port Orchard, US
★★★★★ 4
Great book for growth
Format: Hardcover
Deep and thoughtful book, worth the investment for any training psychotherapist or social worker. Yalom is a leader in the field and one whom I trust. I have my PhD in psychology and can't suggest this enough. .
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Reviewed in the United States on March 7, 2015

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