Size dependence of the dielectric function of silicon-supported plasmonic gold nanoparticles

2010 ◽  
Vol 82 (15) ◽  
Author(s):  
Maria Losurdo ◽  
Maria M. Giangregorio ◽  
Giuseppe V. Bianco ◽  
Alexandra A. Suvorova ◽  
Charlie Kong ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Dielectric Function ◽  
Size Dependence

Nanoparticle dose enhancement of synchrotron radiation in PRESAGE dosimeters

2020 ◽  
Vol 27 (6) ◽  
pp. 1590-1600
Author(s):  
Frank M. Gagliardi ◽  
Rick D. Franich ◽  
Moshi Geso
Keyword(s):  
Gold Nanoparticles ◽  
Synchrotron Radiation ◽  
Gold Nanoparticle ◽  
Size Dependence ◽  
Absorbed Dose ◽  
Nanoparticle Concentration ◽  
Dose Enhancement ◽  
X Ray ◽  
Bismuth Nanoparticles ◽  
Synchrotron Beam

The physical absorbed dose enhancement by the inclusion of gold and bismuth nanoparticles fabricated into water-equivalent PRESAGE dosimeters was investigated. Nanoparticle-loaded water-equivalent PRESAGE dosimeters were irradiated with superficial, synchrotron and megavoltage X-ray beams. The change in optical density of the dosimeters was measured using UV–Vis spectrophotometry pre- and post-irradiation using a wavelength of 630 nm. Dose enhancement was measured for 5 nm and 50 nm monodispersed gold nanoparticles, 5–50 nm polydispersed bismuth nanoparticles, and 80 nm monodispersed bismuth nanoparticles at concentrations from 0.25 mM to 2 mM. The dose enhancement was highest for the 95.3 keV mean energy synchrotron beam (16–32%) followed by the 150 kVp superficial beam (12–21%) then the 6 MV beam (2–5%). The bismuth nanoparticle-loaded dosimeters produced a larger dose enhancement than the gold nanoparticle-loaded dosimeters in the synchrotron beam for the same concentration. For the superficial and megavoltage beams the dose enhancement was similar for both species of nanoparticles. The dose enhancement increased with nanoparticle concentration in the dosimeters; however, there was no observed nanoparticle size dependence on the dose enhancement.

Size-dependence of Fermi energy of gold nanoparticles loaded on titanium(iv) dioxide at photostationary state

2008 ◽  
Vol 10 (43) ◽  
pp. 6553 ◽  
Author(s):  
Tomokazu Kiyonaga ◽  
Masashi Fujii ◽  
Tomoki Akita ◽  
Hisayoshi Kobayashi ◽  
Hiroaki Tada
Keyword(s):  
Gold Nanoparticles ◽  
Fermi Energy ◽  
Size Dependence ◽  
Photostationary State

scholarly journals Size dependence of refractive index of gold nanoparticles

2006 ◽  
Vol 17 (5) ◽  
pp. 1309-1315 ◽  
Author(s):  
Lucía B Scaffardi ◽  
Jorge O Tocho
Keyword(s):  
Gold Nanoparticles ◽  
Refractive Index ◽  
Size Dependence

SIZE DEPENDENCE OF INTERBAND TRANSITIONS IN Al NANOPARTICLE

2011 ◽  
Vol 25 (25) ◽  
pp. 3361-3369
Author(s):  
YAJING PENG ◽  
XUEFEI YIN ◽  
WEIQIANG DING
Keyword(s):  
Size Effect ◽  
Dielectric Function ◽  
Linear Relation ◽  
Size Dependence ◽  
Interband Transition ◽  
Important Application ◽  
Laser Ignition ◽  
Interband Transitions ◽  
Nanoenergetic Materials ◽  
Nm Range

The interband transition onset frequency of nanoaluminum is found to approximately, linearly decrease as reducing aluminum diameter in the 25–100 nm range. This linear relation is indicated to originate mostly from increased inner strain of nanoparticle caused by the small size effect. This relation realizes to introduce the size dependence of interband transitions into the metallic dielectric function and has its important application in the laser ignition of nanoenergetic materials.

Sign in / Sign up

Export Citation Format

Share Document