منابع مشابه
Direct deposition and assembly of gold colloidal particles using a nanofountain probe.
We report the direct delivery and assembly of negatively charged gold colloidal particles atop positively charged amino-terminated silicon oxide surfaces using a nanofountain atomic force microscopy probe. The experimental results and fluid simulations indicate that the flow of nanoparticles is confined to the core tip region of the probe. This leads to the assembly of high-resolution submicron...
متن کاملColloidal Synthesis of Gold Semishells
This work describes a novel and scalable colloid chemistry strategy to fabricate gold semishells based on the selective growth of gold on Janus silica particles (500 nm in diameter) partly functionalized with amino groups. The modulation of the geometry of the Janus silica particles allows us to tune the final morphology of the gold semishells. This method also provides a route to fabricating h...
متن کاملNonlinear Raman Probe of Single Molecules Attached to Colloidal Silver and Gold Clusters
We review surface-enhanced linear and nonlinear Raman scattering experiments on molecules and single wall carbon nanotubes attached to colloidal silver and gold clusters. Surface-enhanced hyper-Raman scattering and surface-enhanced anti-Stokes Raman scattering from pumped vibrational levels are studied as twophoton excited Raman processes where the scattering signal depends quadratically on the...
متن کاملPolarity sensitive colloidal gold nanoparticles
Water soluble colloidal nanoparticles possess huge surface negative charge and this provides their colloidal stability [1]. The surface charge, therefore, ultimately demonstrate the overall behavior of the nanoparticles irrespective of core material. We demonstrate fluorescence based dual emission polarity sensor that is based upon hydroxyflavone derivative [2]. The NH2 group at position 7 faci...
متن کاملSpectroimmunochemistry using colloidal gold bioconjugates.
Using surface-enhanced infrared absorption (SEIRA) spectroscopy of dry films of colloidal gold (CG) bioconjugates with protein A, it is shown that certain characteristic bands of the protein (e.g., amide I, amide II and some other vibration modes) are essentially affected by the metal surface. Thus, the method may be used for controlling the quality of such bioconjugates. Moreover, it is demons...
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ژورنال
عنوان ژورنال: Microscopy Today
سال: 1996
ISSN: 1551-9295,2150-3583
DOI: 10.1017/s1551929500063343