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  • AIP Publishing  (2)
  • 1
    Online Resource
    Online Resource
    Magnetic properties of hexanuclear manganese antiferromagnetic clusters {Mn6}
    AIP Publishing ; 2006
    In:  Journal of Applied Physics Vol. 99, No. 8 ( 2006-04-15)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 99, No. 8 ( 2006-04-15)
    Abstract: We report a study of magnetic properties of a series of hexanuclear manganese metallamacrocycles {Mn6}. The magnetic properties are characterized by antiferromagnetic (AFM) coupling constants J1∕kB≈−4.0K, between the nearest neighbors, and J2∕kB≈−1.2K, between the next-nearest neighbors. The temperature dependence of H1 NMR linewidth is observed to be consistent with the AFM singlet ground state with a total spin ST=0. H1 nuclear spin-lattice relaxation rate 1∕T1 shows a strong enhancement at low temperatures with a peak around T≈J1, as commonly observed in AFM molecular rings and clusters.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.2169572
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2006
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Versatile high-speed confocal microscopy using a single laser beam
    AIP Publishing ; 2020
    In:  Review of Scientific Instruments Vol. 91, No. 3 ( 2020-03-01)
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 91, No. 3 ( 2020-03-01)
    Abstract: We present a new flexible high speed laser scanning confocal microscope and its extension by an astigmatism particle tracking velocimetry (APTV) device. Many standard confocal microscopes use either a single laser beam to scan the sample at a relatively low overall frame rate or many laser beams to simultaneously scan the sample and achieve a high overall frame rate. The single-laser-beam confocal microscope often uses a point detector to acquire the image. To achieve high overall frame rates, we use, next to the standard 2D probe scanning unit, a second 2D scan unit projecting the image directly onto a 2D CCD-sensor (re-scan configuration). Using only a single laser beam eliminates crosstalk and leads to an imaging quality that is independent of the frame rate with a lateral resolution of 0.235 µm. The design described here is suitable for a high frame rate, i.e., for frame rates well above the video rate (full frame) up to a line rate of 32 kHz. The dwell time of the laser focus on any spot in the sample (122 ns) is significantly shorter than those in standard confocal microscopes (in the order of milli- or microseconds). This short dwell time reduces phototoxicity and bleaching of fluorescent molecules. The new design opens up further flexibility and facilitates coupling to other optical methods. The setup can easily be extended by an APTV device to measure three dimensional dynamics while being able to show high resolution confocal structures. Thus, one can use the high resolution confocal information synchronized with an APTV dataset.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.5122311
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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