Oxygen microscopy by two-photon-excited phosphorescence.
Oxygen microscopy by two-photon-excited phosphorescence.
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DOI:
10.1002/cphc.200800296
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发表时间:
2008-08-25
期刊:
影响因子:
--
通讯作者:
Vinogradov SA
中科院分区:
文献类型:
--
作者:
Finikova OS;Lebedev AY;Aprelev A;Troxler T;Gao F;Garnacho C;Muro S;Hochstrasser RM;Vinogradov SA
High-resolution images of oxygen distributions in microheterogeneous samples are obtained by two-photon laser scanning microscopy (2P LSM), using a newly developed dendritic nanoprobe with internally enhanced two-photon absorption (2PA) cross-section. In this probe, energy is harvested by a 2PA antenna, which passes excitation onto a phosphorescent metalloporphyrin via intramolecular energy transfer. The 2P LSM allows sectioning of oxygen gradients with near diffraction-limited resolution, and lifetime-based acquisition eliminates dependence on the local probe concentration. The technique is validated on objects with a priori known oxygen distributions and applied to imaging of pO2 in cells.
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通讯作者:
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DOI:
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发表时间:
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