&lt;title&gt;Polyimides: new properties of xerographic, thermoplastic, and liquid-crystal structures&lt;/title&gt;

Cherkasov, Yuri A.; Каманина, Н. В.; Alexandrova, Elena Lvovna; Berendyaev, V. I.; Vasilenko, N. A.; Kotov, B. V.

doi:10.1117/12.328167

Cited by 28 publications

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“…The C60 and C70 molecules are spherical or rugby-ball in shape, respectively. On exciting, triphenylamine molecule experiences a conformational transformation, changing from the neutral tetrahedral form to the ionized planar one [18]. This effect along with less dimensions of the triphenylamine molecule (0.5 urn) than those of the fullerene molecule (0.7-0.8 nm) allow the arrangement of their molecular planes to be expected in parallel.…”

Section: Resultsmentioning

confidence: 95%

“…From the previous results [14, 1 5 ,1 8] one can say that fullerenes provOke the creation of reverse saturable absorption materials based on polyimide with the high absorption cross section. The absorption cross section of donor-acceptor complex of fullerene with donor polyimide 6B fragment (triphenylamine) was recently estimated in the paper [18]. It is really about 300 times more than the one of intramolecular polyimide complexes.…”

Section: Resultsmentioning

confidence: 99%

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<title>IR laser action on fullerene-doped organic systems</title>

et al. 2001

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An optical limiting of the laser radiation over IR range in organic compounds based on polyimide has been studied. The non-linear transmission at a wavelength of 1 3 1 5 nm as well as spectral properties of the compounds have been investigated.The results obtained have been explained by the donor-acceptor interaction mechanism that affects nonlinear-optical properties of organic molecules. The fullerene-doped polyimide structures have been determined to be effective optical limiting materials for attenuating a power density of more than 2 J•cm2 in the IR range.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

<title>IR laser action on fullerene-doped organic systems</title>

et al. 2001

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“…Moreover, in these papers, the increase in photoconductivity has been observed on fullerene doping and the dependence of the optical limiting level has been obtained on the fullerene concentration. For this system, the absorption cross section for the complex with intermolecular charge transfer between the donor fragment (triphenylamine, TPA) of the polyimide molecule and fullerene as a strong intermolecular acceptor has been determined [47]. A very large absorption cross section  for molecules based on the D-A complex of fullerene with TPA follows from the drastic increase in absorption at the low fullerene concentration.…”

Section: Obtained Results and Discussionmentioning

confidence: 99%

Peculiarity of the Optical Limiting Effect in the Organics Doped With the Fullerenes and With the Relative Nanoparticles

Каманина¹

2017

RadJ

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Abstract. Due to important features of the organic -conjugated nano-objects-doped systems, main properties of which can compete with the basic inorganic bulk material parameters, the study of the organics is dominant. As the effective nano-objects and the intermolecular sensitizers, the following nanoparticles, such as fullerenes, nanotubes, quantum dots, reduced graphene oxide, shungites, etc. have been considered. So many applications of the organic materials doped with nanoparticles have been proposed. Among them, the optical limiting effect occupies a unique place because this process permits, on the one side, to extend the knowledge about the photorefractive features of innovative materials and, from the other side, it is predicted to develop new devices to protect human eyes and technical equipment from high energy density of the laser beam. In the current short review paper, the optical limiting effect will be considered based on the results obtained by some scientific and engineering teams. The data will be shown at the different experimental conditions: the content of the nano-sensitizers can be changed, the range of the wave lengths can be extended, and the level of the attenuation of the laser beam can be varied. It should be mentioned that the experimental wave length can be as the following: 532, 805, 1047, 1064, 1315, 1500, 2940 nm. The materials and optical element based on the structured organics will be shown under the application of the traditional optical limiting scheme and using the four-wave mixing technique to indicate energy losses via diffraction under the Raman-Nath diffraction conditions as one of the optical limiting mechanisms. The level of the attenuation of the laser beam will be shown for the organics based on polyimides, 2-cycloactyl-amine-5-nitropyridine, 2-(n-prolinol)-5-nitropyridine, liquid crystals and other materials. Some ways to form organic photonic crystals will be discussed.

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“…The rotation threshold is 100-700 kcal×mol -1 [12]. This effect is likely to result in a better arrangement of PI donor fragment (triphenylamine) and fullerene planes, and hence in efficient CT between them [13].…”

Section: Resultsmentioning

confidence: 99%

Photorefractive and photoconductive properties of the organic materials doped with fullerenes, quantum dots, and nanotubes

Каманина

Shurpo

Zubtsova

et al. 2010

Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII

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Effective correlation between photoconductive and photorefractive characteristics of fullerene-, quantum dots-, and nanotubes-doped organic thin films based on polyimide, pyridine, etc. have been studied. The increase of the charge carrier mobility has been established. The nonlinear refraction and cubic nonlinearity have been investigated at wavelength of 532 nm via four-wave mixing technique using Raman-Nath diffraction regime. The correlation between photoconductive and nonlinear optical parameters has been revealed. The nanostructured materials can be proposed for different area of nano-and microelectronic applications.

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<title>Polyimides: new properties of xerographic, thermoplastic, and liquid-crystal structures</title>

Cited by 28 publications

References 0 publications

<title>IR laser action on fullerene-doped organic systems</title>

<title>IR laser action on fullerene-doped organic systems</title>

Peculiarity of the Optical Limiting Effect in the Organics Doped With the Fullerenes and With the Relative Nanoparticles

Photorefractive and photoconductive properties of the organic materials doped with fullerenes, quantum dots, and nanotubes

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