Challenges of vertically aligned carbon nanotubes production and application

Carbon nanotubes (CNTs) have play a dominant role in nanotechnology research for over 20 years due to their exceptional properties. Different solid catalytic substrates can be used to produce vertically aligned carbon nanotubes (VACNTs); however it is important that this structure can be achieved mainly on conductive substrates. It is important that further application of this structure is preferable on conductive substrates. The conditions under which the catalytic layer is prepared and synthesized also have major impact on the structure and properties of the resulting vertically aligned carbon nanotubes. Environmental protection and green chemistry are highly discussed topics nowadays. Therefore, the development of energyefficient, sustainable technological solutions is also receiving increasing attention in vertically aligned carbon nanotubes research. Thus, the progress in this direction will be briefly review in this work

Examination of Magnetic Fields of Televisions

Human bodies damages induced by electronic equipment is into of physical and biological research since the revolutionary distribution in households of electric and electromagnetic devices e.g. radios, televisions, mobile phones, microwave ovens etc.This article is related to systematic examinations of magnetic fields generated by such a devices, e.g. televisions in their close vicinity and far away.

A fizikai törvények univerzális jellegéről

The paper deals with general character of physical laws over a wide range of different even from pure physics through geography to stock exchange price variations. The complex-criticality of the dynamics of highly organized systems is emphasized

Production of CNT forests by a simple layer building method on a conductive substrate

The carbon nanotubes (CNTs) play an important role in nanotechnology research today because the CNT have outstanding properties. Many substrates can be used to fabricate carbon nanotube forests (CNT forests); however, it is important that the desired structure is achieved on a conductive substrate, and for these reasons, carbon nanotube forests have been synthetized on a titanium substrate in this research. Environmental protection is highly discussed nowadays, therefore it is necessary to be able to produce CNT forests with less energy investment and costeffectively. For these reasons, we used dip-coating method, which is a simple process and without heat-treatments step to save energy in achieving the forest structure. Therefore, this research uses a dip-coating method to form a catalyst layer on the surface of the substrate, and to investigate the effect of heat-treatment of the substrate to produce CNT forests directly on the titanium substrate

A simple method to build catalyst layers for the synthesis of vertically aligned carbon nanotubes

Nowadays, environmental protection and sustainability are getting more and more attention. Thus, our aim was to develop a cost and energy efficient catalyst layer building method for the synthesis of carbon nanotube forests. A simple spray coating method was used to develop a catalyst layer on the surface of the titanium substrates. Then vertically aligned carbon nanotubes (VACNTs) were synthesized directly on the substrate via catalytic chemical vapor deposition (CCVD) method. During our research, the effect of catalyst layer deposition parameters on the structure of CNTs was investigated and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy