권호 표지

Rapid Communication in Photoscience

한국광과학회 (Korean Society of Photoscience)

  • 반년간
  • /
  • 2234-8182(pISSN)
  • /
  • 2288-4564(eISSN)

과학기술표준분류

  • 물리학 ＞ 광학

Aim & Scope

Rapid Communication in Photoscience (RCP) is published quarterly by the Korean Society of Photoscience. Its aim is to report both experimental and theoretical researches in rapid communications dealing with all aspects of photosciences. Appropriate subjects include photochemistry, photobiology, photomaterials, photocatalyst, photovoltaic materials and process, photoactive biomolecules, photoinduced electron (charge) and energy transfer, photomedicine, photographic chemistry, photomorphogenesis, photomovement, singlet oxygen in chemistry, biology, and medicine, photonics, quantum dot and nanophotonics, photoreception, photochromic materials and molecular switches, photosensitization, photosynthesis, phototechnology, spectroscopy, ultraviolet radiation effects, and vision. Rapid review processes for submitted manuscripts will be completed within 14 days. Once they have been accepted and proofs corrected by authors, they are published on the web with their volumes and page numbers.

제4권3호

  1. Park, Jin Jae;Kim, Kuk Ki;Roy, Madhusudan;Song, Jae Kyu;Park, Seung Min 50
    https://doi.org/10.5857/RCP.2015.4.3.50 PDF KSCI
    $SnO_2$ thin films were deposited on fused silica substrate by pulsed laser deposition under transverse magnetic field. We have explored the effects of magnetic field and ablation laser wavelength on the optical properties of laser-induced plasma plume and structural characteristics of the deposited $SnO_2$ films. Optical emission from the plume was monitored using an optical fiber to examine the influence of magnetic field on the population of the excited neutral and ionic species and their decay with times after laser ablation. Also, we employed photoluminescence, x-ray diffraction, and UV-Vis absorption to characterize $SnO_2$ films.
  2. Choi, Kyong-Hoon;Wang, Kang-Kyun;Ha, Jeong-Hyon;Kim, Yong-Rok 54
    https://doi.org/10.5857/RCP.2015.4.3.54 PDF KSCI
    Under the condition of femtosecond impulsive nonlinear optical irradiation, the bright and narrowed blue emission of silicon nanocrystal was observed. This synthetic method produced very small (~ 4 nm) oxide-capped silicon nanocrystal having probably ultra small emitting core (~ 1 nm) inferred from luminescence. By controlling the stirring condition, very high efficiencies of luminescence ( 4 fold higher) were obtained compared with the other conventional femtosecond laser fragmentation methods, which was attributed to the differences in hydration shell structure during the femtosecond laser induced irreversible phase transition reaction. When we properly adjusted the irradiation times of the white light continuum and stirring condition, very homogeneous luminescent silicon nanocrystal bands having relatively sharp lineshape were obtained, which can be attributable to the luminescent core site isolated and free from the surface defects.
  3. Lee, Hwiin;Kim, Jeongyun;Kwon, Yong-Uk;Lee, Minyung 59
    https://doi.org/10.5857/RCP.2015.4.3.59 PDF KSCI
    We investigated photo-induced electron transfer (PET) in a dye-labeled peptide, fluorophore-Ala-Gly-Gln-Tyr, employing time-resolved fluorescence. As an effort to develop new functional dyes, we studied an acriflavine derivative for the electron-acceptor in the excited state from tyrosine, an electrondonor in the ground-state. The pH dependence of the fluorescence lifetime of the model peptide indicates that electron transfer between the excited dye and tyrosine occurs when the tyrosine is deprotonated. The proton-coupled electron transfer appears to be sequential rather than concerted. We also report direct time measurements on the end-to-end loop formation processes of the peptide in water.
  4. Kim, So-Yeon;Lee, Jeongmook;Kim, Sang Kyu 63
    https://doi.org/10.5857/RCP.2015.4.3.63 PDF KSCI
    When the molecule in the excited state is subject to prompt predissociation, it is quite nontrivial to obtain vibrational structure of the excited state in general. This applies to the case of photochemistry of dimethylamine (DMA:$(CH_3)_2NH$). When DMA is excited to its first electronically excited state ($S_1$), the N-H bond dissociation occurs promptly. Therefore, $S_1$ vibronic bands are homogeneously broadened to give extremely small ionization cross sections and heavily-congested spectral features, making infeasible any reasonable spectral assignment. Here, we demonstrate that the predissociation rate of the excited state could be significantly reduced by the NH/ND substitution to give the much better-resolved $S_1$ spectral feature, revealing the vibrational structure of the excited state of $DMA-d_1$ ($(CH_3)_2ND$) for the first time.
  5. Manna, Arpan;Lim, Manho 67
    https://doi.org/10.5857/RCP.2015.4.3.67 PDF KSCI
    FTIR spectroscopy has been employed to investigate the variation of anion-water hydrogen bonding in 1-butyl 3-methyl imidazolium tetrafluoroborate ([Bmim][$BF_4$]) ionic liquid caused by addition of organic co-solvents with various polarities. The variation was estimated by probing band shape and intensity of the OH stretching vibration of trace water present in ionic liquid at $3400-3800cm^{-1}$. The presence of polar aprotic co-solvent in ionic liquid dramatically reduces the absorptivity of the OH stretch band, indicating that the co-solvent changes the nature of anion-water hydrogen bond drastically, which might be responsible for the reduction of the viscosity of ionic liquid in the presence of the co-solvent.
  6. Eom, Intae;Lim, Seon Jeong;Park, Soo Young;Joo, Taiha 70
    https://doi.org/10.5857/RCP.2015.4.3.70 PDF KSCI
    Oligomers of p-phenylene vinylene and its derivatives have drawn much attention due to their unusual emission characteristics of showing increased emission when they form into nanoparticles. We have investigated the optical properties of the oligo-(p-phenylene vinylene) and its cyano-substituted derivatives in solution and in nanoaggregate media by femtosecond and picosecond time resolved fluorescence as well as stationary spectroscopies. All the spectroscopic data are consistent with the conclusion that the cyano substitution on the ${\beta}$-position of oligo-(p-phenylene vinylene) leads to breakage of the otherwise planar structure of cyano-unsubstituted molecules, which opens up an extremely efficient, as fast as 100 fs, non-radiative relaxation channel of the excited state. Formation of the nanoaggregates reverts the effect to make the molecules planar and to block the non-radiative relaxation channel. Therefore, concerning the applications in organic electroluminescent devices and organic light emitting diodes, substitution by the cyano group is not advantageous, although such modification should be useful in respect of controlling fluorescence intensity in different media.
  7. Kyung, Hyunsook;Cho, Young-Jin;Choi, Wonyong 73
    https://doi.org/10.5857/RCP.2015.4.3.73 PDF KSCI
    Cr(VI) reduction was successfully achieved in the presence of cationic micelles (CMs) under visible light illumination. Micelle formation of cationic surfactants seems to be critical in Cr(VI) reduction. Cr(VI) was reduced very fast above the critical micelle concentration (cmc) of CTAB solutions, but was not reduced at all either below or around the cmc of CTAB. The reduction rate of Cr(VI) was enhanced in the absence of dissolved oxygen, supporting that the removal of Cr(VI) should be achieved via a reductive pathway. When CTAB was substituted by Brij 35 or SDS, the reduction of Cr(VI) was negligible. This indicates that the electrostatic interaction between Cr(VI) and headgroups of surfactants is important in the visible light-induced Cr(VI) reduction in micellar solutions.