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  • AIP Publishing  (20)
  • Asia - CrossAsia  (20)
  • 1
    Online Resource
    Online Resource
    Photodissociation of HOD via the C̃ 1B1 State: OD/OH Branching Ratio and OD Bond Dissociation Energy
    AIP Publishing ; 2011
    In:  Chinese Journal of Chemical Physics Vol. 24, No. 2 ( 2011-04-01), p. 129-133
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 24, No. 2 ( 2011-04-01), p. 129-133
    Abstract: Photodissociation of jet-cooled HOD via the C̃ state around 124 nm has been studied using the H(D)-atom Rydberg tagging time-of-flight technique. Rotational state resolved action spectrum and the product translational energy distribution spectra have been recorded for both D+OH and H+OD dissociation channels. Product channel OH/OD branching ratios for the individual C̃-X̃ rotational transition have been determined. A comparison is also given with the B̃-X̃ and Ã-X̃ transitions. In addition, the dissociation energy of the OD bond in HOD has been determined accurately to be 41751.3±5 cm−1.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1088/1674-0068/24/02/129-133
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2011
    detail.hit.zdb_id: 2381472-X
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  • 2
    Online Resource
    Online Resource
    Miniature Boat Fabrication with Striking Loading Capacity in Seawater from Hydrophobic Steel Mesh
    AIP Publishing ; 2015
    In:  Chinese Journal of Chemical Physics Vol. 28, No. 6 ( 2015-12-27), p. 762-766
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 28, No. 6 ( 2015-12-27), p. 762-766
    Abstract: A superhydrophobic steel mesh film was prepared by combination of macro-scale rough surface and low surface energy material treatment through a facile coating method. The contact angle for seawater is measured to be as high as 130.16°. A reformed Cassie-Baxter equation was applied for the theoretical predictions of this novel material for the first time. Good agreement between the predictions and experiments was obtained. The loading capacities of these boats, fabricated from the resulting hydrophobic steel meshes, were also characterized. The highest loading weight about 17.50 g was obtained by the steel mesh treated by 2.0wt% (heptadecafluoro-1,1,2,2,-tetradecyl)trimethoxysilane solution. The striking loading capacity of this miniature boat may be attributed to the air film trapped around the mesh surface. This novel superhydrophobic steel mesh material have wide applications on medical materials, marine materials and smart materials.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1063/1674-0068/28/cjcp1503030
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2015
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  • 3
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    Online Resource
    Vibrational Spectra of Nonrigid Molecule HCP in an Algebraic Model
    AIP Publishing ; 2006
    In:  Chinese Journal of Chemical Physics Vol. 19, No. 6 ( 2006-12-01), p. 478-480
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 19, No. 6 ( 2006-12-01), p. 478-480
    Abstract: An algebraic Hamiltonian for the two coupled nonlinear vibrations of highly excited nonrigid molecule HCP was presented. The Hamiltonian reduces to the conventional one in a limit which was expressed in terms of harmonic oscillator operators. It showed that the algebraic model can better reproduce the data than the conventional model by fitting the observed data of HCP.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1360/cjcp2006.19(6).478.3
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2006
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  • 4
    Online Resource
    Online Resource
    Influence of molecular stacking pattern on excited state dynamics of copper phthalocyanine films
    AIP Publishing ; 2022
    In:  Chinese Journal of Chemical Physics Vol. 35, No. 6 ( 2022-12-01), p. 900-906
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 35, No. 6 ( 2022-12-01), p. 900-906
    Abstract: Photophysical processes occurring within organic semiconductors is important for designing and fabricating organic solar cells. Copper phthalocyanine (CuPc) is a typical electron acceptor. In this work, the triplet exciton lifetime is prolonged by altering the molecular stacking pattern of the CuPc film. For CuPc thin films, the excited state decays are mainly determined by the triplet-triplet annihilation process. The ultrafast transient absorption measurements indicate that the primary annihilation mechanism is one-dimensional exciton diffusion collision destruction. The decay kinetics show a clearly time-dependent annihilation rate constant with γ∝t−1/2. Annihilation rate constants are determined to be γ0 = (2.87±0.02)×10−20 cm3·s−1/2 and (1.42±0.02)×10−20 cm3·s−1/2 for upright and lying-down configurations, respectively. Compared to the CuPc thin film with an upright configuration, the thin film with a lying-down configuration shows longer exciton lifetime and higher absorbance, which are beneficial to organic solar cells. The results in this work have important implications on the design and mechanistic understanding of organic optoelectronic devices.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1063/1674-0068/cjcp2103052
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
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  • 5
    Online Resource
    Online Resource
    Detection of radiocarbon dioxide with double-resonance absorption spectroscopy
    AIP Publishing ; 2021
    In:  Chinese Journal of Chemical Physics Vol. 34, No. 4 ( 2021-08-01), p. 373-380
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 34, No. 4 ( 2021-08-01), p. 373-380
    Abstract: Fast and accurate quantitative detection of 14CO2 has important applications in many fields. The optical detection method based on the sensitive cavity ring-down spectroscopy technology has great potential. But currently it has difficulties of insufficient sensitivity and susceptibility to absorption of other isotopes/impurity molecules. We propose a stepped double-resonance spectroscopy method to excite 14CO2 molecules to an intermediate vibrationally excited state, and use cavity ringdown spectroscopy to probe them. The two-photon process significantly improves the selectivity of detection. We derive the quantitative measurement capability of double-resonance absorption spectroscopy. The simulation results show that the double-resonance spectroscopy measurement is Doppler-free, thereby reducing the effect of other molecular absorption. It is expected that this method can achieve high-selectivity detection of 14CO2 at the sub-ppt level.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1063/1674-0068/cjcp2103045
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2021
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  • 6
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    Online Resource
    Effect of Hydrogen Addition on Methane HCCI Engine Ignition Timing and Emissions Using a Multi-zone Model
    AIP Publishing ; 2009
    In:  Chinese Journal of Chemical Physics Vol. 22, No. 3 ( 2009-06-01), p. 290-296
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 22, No. 3 ( 2009-06-01), p. 290-296
    Abstract: Ignition timing control is of great importance in homogeneous charge compression ignition engines. The effect of hydrogen addition on methane combustion was investigated using a CHEMKIN multi-zone model. Results show that hydrogen addition advances ignition timing and enhances peak pressure and temperature. A brief analysis of chemical kinetics of methane blending hydrogen is also performed in order to investigate the scope of its application, and the analysis suggests that OH radical plays an important role in the oxidation. Hydrogen addition increases NOx while decreasing HC and CO emissions. Exhaust gas recirculation (EGR) also advances ignition timing; however, its effects on emissions are generally the opposite. By adjusting the hydrogen addition and EGR rate, the ignition timing can be regulated with a low emission level. Investigation into zones suggests that NOx is mostly formed in core zones while HC and CO mostly originate in the crevice and the quench layer.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1088/1674-0068/22/03/290-296
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2009
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  • 7
    Online Resource
    Online Resource
    Non-linear Viscoelastic Rheological Properties of PCC/PEG Suspensions
    AIP Publishing ; 2009
    In:  Chinese Journal of Chemical Physics Vol. 22, No. 1 ( 2009-02-01), p. 46-50
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 22, No. 1 ( 2009-02-01), p. 46-50
    Abstract: The shear thinning and shear thickening rheological properties of PCC/PEG suspension were investigated with the increase of oscillatory amplitude stress at different constant frequencies. The results show that the complex viscosity was initially independent of stress amplitude and obvious shear thinning occurred, then dramatic shear thickening took place after reaching the minimum viscosity. Typically, in a constant frequency of 5 rad/s, the elastic modulus, viscous modulus, and tan ( is the out-of-phase angle) vs. the stress amplitude was investigated. It is found that the elastic modulus initially appeared to be independent of stress amplitude and then exhibited a rapid decrease, but the viscous modulus was independent of amplitude stress at lower amplitude stress. After reaching the minimum value the viscous modulus showed a rapid increase. On the other hand, tan increased from 0.6 to 92, which indicates that the transition from elastic to viscous had taken place and tan showed a steep increase when shear thickening occurred. Lissajous plots are shown for the dissipated energy vs. different maximum stress amplitude in the shear thinning and shear thickening regions. The relationship of dissipated energy vs. maximum stress amplitude was determined, which follows a power law. In the shear thinning region the exponent was 1.91, but it steeply increases to 3.97 in the shear thickening region.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1088/1674-0068/22/01/46-50
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2009
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  • 8
    Online Resource
    Online Resource
    Geometrical Structures and Electronic Properties of Copper-Doped Aluminum Clusters
    AIP Publishing ; 2012
    In:  Chinese Journal of Chemical Physics Vol. 25, No. 2 ( 2012-04-01), p. 169-176
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 25, No. 2 ( 2012-04-01), p. 169-176
    Abstract: Using density function theory (DFT), the Cu-doped Aln (n=1−15) clusters have been studied. The electron affinity, ionization potential, Mulliken population analysis of Cu, mean polarizability, polarizability anisotropy, dipole moments and HOMO-LUMO gaps have also been calculated on the basis of optimized geometries. The results indicate that there is magic numbers in copper-doped aluminum clusters and electronic characteristic depended on the size of clusters. As n=13, the electron affinity and ionization potential of cluster changed more than 0.3 and 0.6 eV respectively, compared with neighborhood clusters.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1088/1674-0068/25/02/169-176
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2012
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  • 9
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    Online Resource
    Counting Radio-Krypton Atoms with a Laser
    AIP Publishing ; 2015
    In:  Chinese Journal of Chemical Physics Vol. 28, No. 4 ( 2015-08-27), p. 445-451
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 28, No. 4 ( 2015-08-27), p. 445-451
    Abstract: Because of their unique chemical and physical properties, long-lived rare krypton radioisotopes, 85Kr and 81Kr, are ideal tracers for environmental samples, including air, groundwater and ice. Atom trap trace analysis (ATTA) is a new laser-based method for counting both 85Kr and 81Kr atoms with the abundance as low as 10−14 with micro-liters (STP) krypton gas. The entire system for rare radio-krypton measurement built at Hefei is presented, including the atom trap trace analysis instrument and sampling apparatus of gas extraction from water and krypton purification. Atmospheric 85Kr concentrations at different places in China were measured, showing a range of 1.3–1.6 Bq/m3, consistent with the northern hemispheric baseline. As a demonstration of the system, some shallow and deep groundwater samples in north and south China were sampled and dated.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1063/1674-0068/28/cjcp1505108
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2015
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  • 10
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    Online Resource
    Highly effective detection of amitraz in honey by using surface-enhanced Raman scattering spectroscopy coupled with chemometric methods
    AIP Publishing ; 2019
    In:  Chinese Journal of Chemical Physics Vol. 32, No. 4 ( 2019-08-01), p. 444-450
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 32, No. 4 ( 2019-08-01), p. 444-450
    Abstract: As an effective and universal acaricide, amitraz is widely used on beehives against varroasis caused by the mite Varroa jacobsoni. Its residues in honey pose a great danger to human health. In this study, a sensitive, rapid, and environmentally friendly surface-enhanced Raman spectroscopy method (SERS) was developed for the determination of trace amount of amitraz in honey with the use of silver nanorod (AgNR) array substrate. The AgNR array substrate fabricated by an oblique angle deposition technique exhibited an excellent SERS activity with an enhancement factor of ~107. Density function theory was employed to assign the characteristic peak of amitraz. The detection of amitraz was further explored and amitraz in honey at concentrations as low as 0.08 mg/kg can be identified. Specifically, partial least square regression analysis was employed to correlate the SERS spectra in full-wavelength with Camitraz to afford a multiple-quantitative amitraz predicting model. Preliminary results show that the predicted concentrations of amitraz in honey samples are in good agreement with their real concentrations. Compared with the conventional univariate quantitative model based on single peak’s intensity, the proposed multiple-quantitative predicting model integrates all the characteristic peaks of amitraz, thus offering an improved detecting accuracy and anti-interference ability.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1063/1674-0068/cjcp1808193
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2019
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