10 research outputs found
Shape Control of Ag Shell Growth on Au Nanodisks
No full textCore–shell (Au@Ag) bimetallic nanoparticles containing
a
Au nanodisk in the core were synthesized using Au nanodisks as seeds.
The growth direction of the Ag shell on the gold nanodisks could be
tuned by the presence of iodide ions. Without the I– ions, the Ag shell was formed homogeneously over the entire surface
of the flat Au nanodisks, while the presence of I– induced the selective coating of the Ag shell in the direction perpendicular
to the basal plane of the nanodisks. The resulting core–shell
(Au@Ag) bimetallic nanoparticles could be further converted to hollow
nanostructures containing a central Au nanodisk via galvanic replacement
reactions
Optical Sensitivity Comparison of Multiblock Gold–Silver Nanorods Toward Biomolecule Detection: Quadrupole Surface Plasmonic Detection of Dopamine
No full textIn
this work, we tested multiblock nanorods (NRs) with Au and Ag
segments for the surface plasmonic detection of dopamine (DA). A change
in the quadrupole surface plasmon mode was found to be sensitive to
the Au/Ag block length and relative block ratio in a single NR. The
surfaces of the NRs were decorated with monoclonal antibody (Mab)
against DA. By comparing the results for pure Au NRs with those obtained
for multiblock Au–Ag–Au NRs, we found that the magnitude
of peak-shifting for the multiblock NRs was much larger than that
for pure Au NRs. This result was attributed to the higher sensitivity
of Ag to a change in the dielectric constant of the surrounding medium
when compared to Au and the sensitive surface plasmon coupling at
the junction between Au and Ag blocks. The magnitude of peak-shifting
was tuned as a function of both the length of the Ag block and the
number of repeating units of Au and Ag in the NRs
Galvanically Replaced Hollow Au–Ag Nanospheres: Study of Their Surface Plasmon Resonance
No full textWe synthesized hollow Au–Ag nanospheres (NSs)
by employing
a galvanic replacement reaction between HAuCl<sub>4</sub> and Ag NSs.
Uniform Ag NSs with controllable sizes were synthesized as sacrificial
templates by a seed-mediated strategy. The atomic ratio of Au to Ag
in Au–Ag NSs was tunable by controlling the reagent concentration.
UV–vis extinction spectra acquired from well-dispersed colloidal
NS solutions were used to investigate the optical properties of the
solutions. In addition to a common dipole mode exhibited on most transition
metal nanoparticles, we observed a quadrupole plasmon resonance mode
when the diameters of the Ag and Au–Ag NSs were larger than
100 nm. The quadrupole and dipole peaks both shifted to longer wavelengths
with increased Au content in Au–Ag NSs. The experimental observation
of optical properties of hollow Au–Ag NSs was compared with
the theoretical simulation using DDA calculation, showing a good agreement
Additional file 3 of Impact of media compositions and culture systems on the immunophenotypes of patient-derived breast cancer cells
No full textSupplementary Material
Additional file 2 of Impact of media compositions and culture systems on the immunophenotypes of patient-derived breast cancer cells
No full textSupplementary Material
Additional file 1 of Impact of media compositions and culture systems on the immunophenotypes of patient-derived breast cancer cells
No full textSupplementary Material
Video 2 from Polymer Thin Film–Induced Tumor Spheroids Acquire Cancer Stem Cell–like Properties
No full textSupplementary Video 2</p
Supplementary Data from Polymer Thin Film–Induced Tumor Spheroids Acquire Cancer Stem Cell–like Properties
No full textThis Supplementary Material contains chemical structures and characterization data of various polymer thin films, flow cytometric analysis and gene expression of ssiCSCs, functional analyses of ssiCSCs, and tables summarizing tumor formation frequency in vivo.</p
