Imaging fluorescence

Wokosin D L, Centonze V, White J G, Armstrong D, Robertson G and Ferguson A I 1996 All-solid-state ultrafast lasers facilitate multiphoton excitation fluorescence imaging IEEE J. Sel. Top. Quantum Electron. 21051-65... 

Wokosin D L and White J G 1997 Optimization of the design of a multiple-photon excitation laser scanning fluorescence imaging system Proc. SPIE 2984 25-9... 

Figure Bl.22.11. Near-field scanning optical microscopy fluorescence image of oxazine molecules dispersed on a PMMA film surface. Each protuberance in this three-dimensional plot corresponds to the detection of a single molecule, the different intensities of those features being due to different orientations of the molecules. Sub-diffraction resolution, in this case on the order of a fraction of a micron, can be achieved by the near-field scaiming arrangement. Spectroscopic characterization of each molecule is also possible. (Reprinted with pennission from [82]. Copyright 1996 American Chemical Society.)...

Figure Cl.5.3. Near-field fluorescence image 4.5 p.m square) of single oxazine 720 molecules dispersed on die surface of a PMMA film. Each peak (fwhm 100 nm) is due to a single molecule. The different intensities are due to different molecular orientations and spectra. Reprinted widi pennission from Xie 11221. Copyright 1996 American Chemical Society.

Figure Cl.5.4. Comparison of near-field and far-field fluorescence images, spectra and lifetimes for the same set of isolated single molecules of a carbocyanine dye at a PMMA-air interface. Note the much higher resolution of the near-field image. The spectmm and lifetime of the molecule indicated with the arrow were recorded with near-field excitation and with far-field excitation at two different excitation powers. Reproduced with pennission from Trautman and Macklin [125].

Figure Cl.5.14. Fluorescence images of tliree different single molecules observed under the imaging conditions of figure Cl.5.13. The observed dipole emission patterns (left column) are indicative of the 3D orientation of each molecule. The right-hand column shows the calculated fit to each observed intensity pattern. Molecules 1, 2 and 3 are found to have polar angles of (0,( ))=(4.5°,-24.6°), (-5.3°,51.6°) and (85.4°,-3.9°), respectively. Reprinted with pennission from Bartko and Dickson [148]. Copyright 1999 American Chemical Society.

Sanchez E J, Novotny L, Floltom G R and Xie X S 1997 Room-temperature fluorescence imaging and spectroscopy of single molecules by two-photon excitation J. Chem. Phys. A 101 7019-23... 

Dunn R C, Holtom G R, Mets L and Xie X S 1994 Near-field fluorescence imaging and fluorescence lifetime measurement of light harvesting complexes in intact photosynthetic membranes J. Chem. Phys. 98 3094-8... 

Clegg R M 1998 Fluoresoenoe resonanoe energy transfer Fluorescence Imaging Spectroscopy and Microscopy ed X F Wang and B Flerman, pp 179-251... 

Although the idea on which NSOM is based goes back more than 50 years (32), D. W. Pohl first beheved it could be achieved with visible light and brought the concept to do it to fmition in 1984 (33). There is considerable interest in NSOM, and two commercial instmments have already been aimounced. A recent appHcation involves using NSOM for localized absorption spectroscopy and fluorescence imaging of living cells (33). 

Vol. 137. Fluorescence Imaging Spectroscopy and Microscopy. Edited by Xue Feng Wang and Brian Herman... 

Roberts, W.L., Driscoll, J.R, Drake, M.C., and Ratcliffe, J.W., OH fluorescence images of the quenching of a premixed flame during an interaction with a vortex, Proc. 

Fig. 5 Polypeptide vesicles demonstrate the ability to utilize the EPR effect, (a) Chemical structure of the amphiphilic block polypeptide PSar-b-PMLG. (b) Fluorescence image using fluorescently labeled PEG. Fluorescence is not observed in the cancer site although accumulation is observed in the bladder, (c) Fluorescence image using ICG-labeled vesicles, showing evidence of vesicle accumulation due to the EPR effect. Adapted from [41] with permission. Copyright 2008 American Chemical Society...

Figure 4.12 Fluorescence image of PMMA brush layer (a) and schematic drawing of the brush chain (b). The dark region (a) corresponds to the substrate surface exposed by scratching off the brush layer. The filled and open circles indicate the points where the fluorescence anisotropy decay was acquired.

Multiphoton Fluorescence Imaging with the Near-Infrared 35 fs Laser Microscope... 

Figure 8.4 (a) Scanning three-photon fluorescence image of pe lene microcrystals obtained by irradiation of the NIR pulse of 1260 nm with power 70 pj pulse scanning step 100nm. (b) Corresponding optical transmission image of the perylene crystals. 

The NIR femtosecond laser microscope realized higher order multi photon excitation for aromatic compounds interferometric autocorrelation detection of the fluorescence from the microcrystals of the aromatic molecules confirmed that their excited states were produced not via stepwise multiphoton absorption but by simultaneous absorption of several photons. The microscope enabled us to obtain three-dimensional multiphoton fluorescence images with higher spatial resolution than that limited by the diffraction theory for one-photon excitation. 

Weston, K D., Dyck, M., Tinnefeld, P., Muller, C., Herten, D. P. and Sauer, M. (2002) Measuring the number of independent emitters in single-molecule fluorescence images and trajectories using coincident photons. Anal. Chem., 74, 5342-5347. 

Biju, V, Muraleedharan, D., Nakayama, K, Shinohara, Y., Itoh, T., Baba, Y. and Ishikawa, M. (2007) Quantum dot-insect neuropeptide conjugates for fluorescence imaging, transfection, and nucleus targeting of living cells. Langmuir, 23, 10254-10261. 

Multidimensional Fluorescence Imaging for Non-Invasive Tracking of Cell Responses 623... 

One possible explanation for DNA aggregation is ion-ion correlation. A combined theoretical-experimental approach supported this interpretation.40 Monte Carlo simulation and fluorescent imaging of the effects of mixing small polyamines and NaCl with Coliphage T4 DNA concurred in demonstrating that addition of salt expands DNA in the presence of a polyamine, while salt alone causes DNA to contract. 

Su, H. and Yeung, E.S. (2000) High-throughput screening of heterogeneous catalysts by laser- induced fluorescence imaging. J. Am. Chem. Soc., 122, 7422. 

Photothermal Spectroscopy Methods for Chemical Analysis. By Stephen E. Bialkowski Element Speclatlon in Bioinorganic Chemistry. Edited by Sergio Caroli Laser-Enhanced Ionization Spectrometry. Edited by John C. Travis and Gregory C. Turk Fluorescence Imaging Spectroscopy and Microscopy. Edited by Xue Feng Wang and Brian Herman... 

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