Recording media, properties

Shen, S. Liu, K. Huijun, X. Gu, D. Tang, F. Chen, Q. Spectroscopic properties of phthalocyanine dyes for optical recording medium. Proc. SPIE Vol. 2931, 73-77. Fourth International Symposium on Optical Storage (ISOS 96), Gan, F.X., Ed. 

In the recording layer, however, the organic dye tends to deteriorate after repeated irradiation with reproduction light, and the reproduction properties of the optical recording medium thereby also deteriorate. 

The biaxially oriented film has an excellent anti-curling property. The anti-curling property means that a film hardly remains curled when rolled once and then unrolled. Whitening has rarely been observed at a fold when the film is folded. This property is called delamination resistance and is an important index for the evaluation of both a base film for a magnetic recording medium and a base film for a photo film. 

To control whether stimulation was successful we continuously recorded the impedance spectra of the cell cultures for 1 h. As published before the stimulation causes an impedance increase at around 17.5 kHz [3]. Nevertheless, these measurements reflect an unrealistic state where the cells are cultivated on the electrodes. Therefore, we also measured the electrical properties of the medium without growing cells on the electrode to describe the status when the neutrophils arrive and exclude their chromatin in the wound. To determine the electrical medium properties we used the cultivation medium as a reference in a new well. The top layer of cell medium in the cell culture was discarded after a stimulation period of 1 h. The remaining bottom layer containing mostly NETs was suspended in the new well. For the unstimulated control sample this medium contains mostly unstimulated cells. All displayed spectra are representatives for one well. 

During holographic recording, local changes of optical properties of the recording medium, corresponding to the distribution of interference maxima, take place. Changes in local... 

Protic Ionic Liquids Solvents with Timable Phase Behavior and Physicochemical Properties. Phys. Chem. B. Vol. 110, No. 45, (Oct. 2006)22479-22487, ISSN 1520-6106 Greaves, T.L., Drummond C.J., (2008). Protic ionic liquids Properties and ajjplications, Chem. Rev., Vol.108, No.l, (Dec. 2007), pp.206-237, ISSN 00092665 Gxmsel, S., Venier, C., Chiu, I-C., (2003). Lubricant for magnetic recording medium and use thereof, U.S. Patent 6667284... 

Jung, J. H. Lee, K. H. Yang, C. S. Synthesis and physical properties of cyanine dyes as optical information recording medium. J. Korean Chem. Soc. 1998, 42, 570-574. 

Finally, if the thermal properties of the recording medium are known, then thermal models may be applied to convert the dissipated power within the medium into a corresponding temperature profile. The FWHM size of the thermal spot and its peak temperature for a given input optical power to the transducer are directly related to the capability of the NFT for HAMR. Because this FOM depends on the specific thermal properties of the multilayer film stack in the recording medium, and these properties are oiten not known with precision, this FOM is of limited usefulness. 

Fig. 2. Basic hysteresis properties for (a) a recording head and for (b) a magnetic medium. See text.

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