fluorescent beads or nanoparticles absorb at 800nm

[Ko, Alex]

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We are developing a tissue phantom with components that will absorb ~ 800nm (not two-photon) and fluoresces at longer wavelength. Anyone knows any commercially available fluorescent beads /nanoparticles that we can use to create small fluorescent sources within the tissue phantom ?

I have searched on the internet and found most commercial products are working with excitation below 700nm.
Any comments are appreciated.


---------------------------
Alex C-T. Ko
Medical Devices
National Research Council Canada

[Craig Brideau]

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Ask LI-COR if you can get their IRDye800 conjugated to dextran.  It is very
bead like and would probably work for what you need.  On a related note:
What are you going to use to detect such a long wavelength?

http://www.licor.com/bio/products/reagents/irdye/irdye800cw.jsp

Craig



On Tue, Sep 24, 2013 at 8:49 AM, Ko, Alex <[hidden email]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> *****
>
> We are developing a tissue phantom with components that will absorb ~
> 800nm (not two-photon) and fluoresces at longer wavelength. Anyone knows
> any commercially available fluorescent beads /nanoparticles that we can use
> to create small fluorescent sources within the tissue phantom ?
>
> I have searched on the internet and found most commercial products are
> working with excitation below 700nm.
> Any comments are appreciated.
>
>
> ---------------------------
> Alex C-T. Ko
> Medical Devices
> National Research Council Canada
>

[George McNamara]

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Contact NIRvana Sciences http://nirvanasciences.com/?page_id=3088 - the
red fluorophore's excitation and emission are both above 800 nm.

For older fluorophores (2006 and earlier) you can download PubSpectra
from http://works.bepress.com/gmcnamara/9/  open the XLSX file (inside
the zip download file) and look for useful spectra.
Urs has some additional fluorophores in http://www.spectra.arizona.edu/ 
-- this is mainly a spectra viewer (download option at bottom right).


On 9/24/2013 9:49 AM, Ko, Alex wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> *****
>
> We are developing a tissue phantom with components that will absorb ~ 800nm (not two-photon) and fluoresces at longer wavelength. Anyone knows any commercially available fluorescent beads /nanoparticles that we can use to create small fluorescent sources within the tissue phantom ?
>
> I have searched on the internet and found most commercial products are working with excitation below 700nm.
> Any comments are appreciated.
>
>
> ---------------------------
> Alex C-T. Ko
> Medical Devices
> National Research Council Canada
>
>    

--



George McNamara, Ph.D.
Single Cells Analyst
L.J.N. Cooper Lab
University of Texas M.D. Anderson Cancer Center
Houston, TX 77054
http://works.bepress.com/gmcnamara/26/