Emission spectral properties of cadmium sulfide nanoparticles with multiphoton excitation

Joseph R. Lakowicz; Ignacy Gryczynski; Gregorz Piszczek; Catherine J. Murphy

doi:10.1021/jp0134953

Emission spectral properties of cadmium sulfide nanoparticles with multiphoton excitation

Joseph R. Lakowicz, Ignacy Gryczynski, Gregorz Piszczek, Catherine J. Murphy

Research output: Contribution to journal › Article › peer-review

Abstract

We describe the luminescence spectral properties of CdS nanoparticles with multiphoton excitation. Three types of CdS nanoparticles were examined which were a CdS/dendrimer composite which displays high anisotropy, Cd²⁺-enriched nanoparticles which display two emission maxima, and polyphosphate-stabilized nanoparticles which display long wavelength emission. Illumination with long wavelengths near 700-790 nm resulted in two-photon excitation. Essentially the same emission spectra and intensity decays were observed with one-photon and two-photon excitation. Comparison with fluorescein indicates the NPs display large two-photon cross sections near 100 GM. The CdS/dendrimer and Cd²⁺-enriched CdS nanoparticles displayed large anisotropy values with two-photon excitation, substantially larger than with one-photon excitation. It appears that semiconductor nanoparticles are comparable to organic fluorophores which display the same spectral properties with one-photon and two-photon excitation.

Original language	English (US)
Pages (from-to)	5365-5370
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	106
Issue number	21
DOIs	https://doi.org/10.1021/jp0134953
State	Published - May 30 2002
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

Online availability

10.1021/jp0134953

Library availability

Discover UIUC Full Text

Cite this

@article{360549fd03e4436f805dd459be6f2348,

title = "Emission spectral properties of cadmium sulfide nanoparticles with multiphoton excitation",

abstract = "We describe the luminescence spectral properties of CdS nanoparticles with multiphoton excitation. Three types of CdS nanoparticles were examined which were a CdS/dendrimer composite which displays high anisotropy, Cd2+-enriched nanoparticles which display two emission maxima, and polyphosphate-stabilized nanoparticles which display long wavelength emission. Illumination with long wavelengths near 700-790 nm resulted in two-photon excitation. Essentially the same emission spectra and intensity decays were observed with one-photon and two-photon excitation. Comparison with fluorescein indicates the NPs display large two-photon cross sections near 100 GM. The CdS/dendrimer and Cd2+-enriched CdS nanoparticles displayed large anisotropy values with two-photon excitation, substantially larger than with one-photon excitation. It appears that semiconductor nanoparticles are comparable to organic fluorophores which display the same spectral properties with one-photon and two-photon excitation.",

author = "Lakowicz, {Joseph R.} and Ignacy Gryczynski and Gregorz Piszczek and Murphy, {Catherine J.}",

year = "2002",

month = may,

day = "30",

doi = "10.1021/jp0134953",

language = "English (US)",

volume = "106",

pages = "5365--5370",

journal = "Journal of Physical Chemistry B",

issn = "1089-5647",

publisher = "American Chemical Society",

number = "21",

}

TY - JOUR

T1 - Emission spectral properties of cadmium sulfide nanoparticles with multiphoton excitation

AU - Lakowicz, Joseph R.

AU - Gryczynski, Ignacy

AU - Piszczek, Gregorz

AU - Murphy, Catherine J.

PY - 2002/5/30

Y1 - 2002/5/30

N2 - We describe the luminescence spectral properties of CdS nanoparticles with multiphoton excitation. Three types of CdS nanoparticles were examined which were a CdS/dendrimer composite which displays high anisotropy, Cd2+-enriched nanoparticles which display two emission maxima, and polyphosphate-stabilized nanoparticles which display long wavelength emission. Illumination with long wavelengths near 700-790 nm resulted in two-photon excitation. Essentially the same emission spectra and intensity decays were observed with one-photon and two-photon excitation. Comparison with fluorescein indicates the NPs display large two-photon cross sections near 100 GM. The CdS/dendrimer and Cd2+-enriched CdS nanoparticles displayed large anisotropy values with two-photon excitation, substantially larger than with one-photon excitation. It appears that semiconductor nanoparticles are comparable to organic fluorophores which display the same spectral properties with one-photon and two-photon excitation.

AB - We describe the luminescence spectral properties of CdS nanoparticles with multiphoton excitation. Three types of CdS nanoparticles were examined which were a CdS/dendrimer composite which displays high anisotropy, Cd2+-enriched nanoparticles which display two emission maxima, and polyphosphate-stabilized nanoparticles which display long wavelength emission. Illumination with long wavelengths near 700-790 nm resulted in two-photon excitation. Essentially the same emission spectra and intensity decays were observed with one-photon and two-photon excitation. Comparison with fluorescein indicates the NPs display large two-photon cross sections near 100 GM. The CdS/dendrimer and Cd2+-enriched CdS nanoparticles displayed large anisotropy values with two-photon excitation, substantially larger than with one-photon excitation. It appears that semiconductor nanoparticles are comparable to organic fluorophores which display the same spectral properties with one-photon and two-photon excitation.

UR - http://www.scopus.com/inward/record.url?scp=0037198830&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037198830&partnerID=8YFLogxK

U2 - 10.1021/jp0134953

DO - 10.1021/jp0134953

M3 - Article

C2 - 31903048

AN - SCOPUS:0037198830

SN - 1089-5647

VL - 106

SP - 5365

EP - 5370

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 21

ER -

Emission spectral properties of cadmium sulfide nanoparticles with multiphoton excitation

Abstract

ASJC Scopus subject areas

Online availability

Library availability

Related links

Fingerprint

Cite this