Measurement of Two-Photon Absorption Cross Section of Metal Ions by a Mass Sedimentation Approach
نویسندگان
چکیده
The photo-reduction of metal ions in solution induced by femtosecond laser is an important and novel method for fabricating three-dimensional metal microstructures. However, the nonlinear absorption cross section of metal ions remains unknown because its measurement is difficult. In the present study, a method based on Two-Photon Excited Sedimentation (TPES) is proposed to measure the two-photon absorption cross section (TPACS) of metal ions in solution. The power-squared dependence of the amount of sediment on the excitation intensity was confirmed, revealing that 800 nm femtosecond laser induced reduction of metal ions was a two photon absorption process. We believe that the proposed method may be applied to measure the TPACS of several metal ions, thereby opening a new avenue towards future analysis of two-photon absorption materials.
منابع مشابه
Charge transfer enhances two-photon absorption in transition metal porphyrins.
Two-photon absorption processes were investigated in electropolymerized Fe(III), Mn(III), and Co(II) 5,10,15,20-tetrakis-(4-hydroxytetraphenyl)porphyrin films. Degenerate four wave mixing (DFWM) spectroscopy with 100 fs pulses in the near-IR spectral region was used. Metalloporphyrins with strong charge transfer (CT) transitions in the linear absorption spectra also show enhanced two-photon abs...
متن کاملTwo-photon-enhanced three-photon absorption in transition-metal-doped semiconductor quantum dots
We report the observation of two-photon-enhanced three-photon absorption (3PA) in transition-metal-doped semiconductor quantum dots (d-QDs) in the near-infrared spectral region. Due to the degeneracy between two-photon transitions to the states of metal ions inside the bandgap and three-photon transitions to the excitonic state, the 3PA cross-section is greatly enhanced in comparison with the p...
متن کاملBias-Induced Optical Absorption of Current Carrying Two-Orbital Quantum Dot with Strong Electron-Phonon Interaction (Polaron Regime)
The one photon absorption (OPA) cross section of a current carrying two-orbital quantum dot (QD) with strong electron-phonon interaction (polaron regime) is considered. Using the self-consistent non-equilibrium Hartree-Fock (HF) approximation, we determine the dependence of OPA cross section on the applied bias voltage, the strength of effective electron-electron interaction, and level spacing ...
متن کاملSupporting Information to Accompany “Designing Two-Photon Fluorescent Probes Based on Target-Induced Enhancement of Absorption Cross Section”
(S3) Measurement of two-photon cross section. (S3) Cytotoxicity assay. (S3) Cell culture. (S4) Two-photon and one-photon fluorescence bioimaging. (S4) Calculation of mean fluorescence intensity (S4) Table S1. Absorption and emission maxima of 1a~1c in DMSO. (S4) Table S2. Absorption and emission maxima of 1c in various solvents. (S10) Fig. S10. 2P microscopy of 2a-labeled HeLa cells for biothio...
متن کاملLighting the Way to See Inside Two-Photon Absorption Materials: Structure–Property Relationship and Biological Imaging
The application of two-photon absorption (2PA) materials is a classical research field and has recently attracted increasing interest. It has generated a demand for new dyes with high 2PA cross-sections. In this short review, we briefly cover the structure-2PA property relationships of organic fluorophores, organic-inorganic nanohybrids and metal complexes explored by our group. (1) The two-pho...
متن کامل