Search results for "Rods"
showing 10 items of 76 documents
Nanostrutture composite ad azione teranostica per il trattamento del cancro
2020
Galactosylated Polymer/Gold Nanorods Nanocomposites for Sustained and Pulsed Chemo-Photothermal Treatments of Hepatocarcinoma
2022
In this paper, we propose a rational design of a hybrid nanosystem capable of locally delivering a high amount of hydrophobic anticancer drugs (sorafenib or lenvatinib) and heat (hyperthermia) in a remote-controlled manner. We combined in a unique nanosystem the excellent NIR photothermal conversion of gold nanorods (AuNRs) with the ability of a specially designed galactosylated amphiphilic graft copolymer (PHEA-g-BIB-pButMA-g-PEG-GAL) able to recognize hepatic cells overexpressing the asialoglycoprotein receptor (ASGPR) on their membranes, thus giving rise to a smart composite nanosystem for the NIR-triggered chemo-phototherapy of hepatocarcinoma. In order to allow the internalization of A…
Microfluidic continuous flow synthesis of rod-shaped gold and silver nanocrystals
2009
We present a continuous flow synthesis of gold and silver nanorods allowing tailored design of particles with desired shapes and online monitoring of particle growth.
Enhanced Thermal Stability of Gold and Silver Nanorods by Thin Surface Layers
2007
Using in situ transmission electron microscopy, we find that a carbon shell governs the morphological transitions of gold and silver nanorods upon heating. Encapsulated Ag nanorods show a surprising nonuniform sublimation behavior starting from one side and leaving behind the shell. Uncovered gold nanorods transform their shape to spheres well below the bulk melting temperature through surface diffusion, which is prevented by a thin carbon shell.
Botānikas katedras mācību preparāti
2020
Latvijas Universitātes Muzeja Botānikas un mikoloģijas kolekcijās glabājas vēl Rīgas Politehniskā institūta (1896—1918) mācību preparāti, kas vēlākos gados ir izmantoti LU Botānikas katedrā. Raksts iepazīstina ar mikrosēņu mācību preparātiem un mikologa Jūlija Smaroda (1884 – 1956) “Latvijas sēņu eksikāts” (Fungi latvici exiccati) kolekcijām.
L’USO DEI DISPOSITIVI DI RINFORZO LIGNEO NELL’ARCHITETTURA SICILIANA IN ETÀ MODERNA
2014
Il saggio studia l’uso dei dispositivi di rinforzo ligneo nelle architetture siciliane d’età moderna ponendo criticamente a confronto documenti di fabbrica, brani tratti dai trattati d’architettura, siciliani e non, e contributi offerti dalla letteratura storica non specialistica. Lo studio evidenzia la persistenza e le peculiarità d’uso di una tecnica che, molto diffusa in area mediterranea, in Sicilia si configura come una “invariante” del repertorio costruttivo tradizionale.
Fabrication and characterisation of ZnO nanostructures: from nanoscale building blocks to hybrid nanomaterials - towards emerging technologies in sen…
2012
Metal oxide nanostructures characterized by multiple morphologies and structures are at the forefront of applications driven nanotechnology research. In particular, they represent a versatile solution for performance enhancement and applications in multifunctional devices and offer distinct advantages over their bulk counterparts. The current state in ZnO nanomaterials research and its impact in nanotechnology and modern engineering are discussed through the lens of con-tinuing technological advances in synthetic techniques allowing to obtain the material with predefined specific set of criteria including size, functionality, and uniqueness. Aim of this research activity is fabrication and …
Coalescence of ZnO nanorods grown by chemical bath deposition
2018
In this work, a way to grow isolated and coalesced ZnO nanorods on p-GaN/sapphire structure is presented. Chemical bath deposition [1],[2] was used to grow ZnO nanorods of device-quality on a p-GaN/n-GaN/sapphire template, simply controlling the duration time of the growth process and the concentration of the nutrient solution in the bath. Several p-GaN templates were soaked in a nutrient solution, prepared with different concentration of zinc nitrate hexahydrate (Sigma-Aldrich, reagent grade 98%) and hexamethylenetetramine (Alfa Aesar, ACS 99%) in deionized water, while being heated at a temperature of 80 °C for a period varying from 8 to 25 hours; then, the samples were left in the soluti…
SNOM signal near plasmonic nanostructures: an analogy with fluorescence decays channels
2008
International audience; Scanning Near-field Optical Microscope (SNOM) is based on local excitations of nanostructures deposited on a substrate (illumination mode). Ideally, the local source behaves like a dipolar emitter so that the SNOM signal is strongly similar to the fluorescence decay rates of an excited molecule that would be located at the SNOM tip position. We present here how the SNOM signal near plasmonic nanostructures can be used to analyze radiative and non-radiative contribution to the fluorescence decay rate.
Stacionārā strādājošu māsu arodslimību rašanās ietekmējošie faktori
2020
Bakalaura darba tēma - Stacionārā stādājošu māsu arodslimības ietekmējošie faktori. Medicīnas māsas katru dienu ir pakļautas arodfaktoru ietekmei, kuras dēļ var rasties problēmas ar veselību un nespēja veikt darbu. Darba mērķis ir noskaidrot stacionārā strādājošu māsu arodslimības rašanās ietekmējošos faktorus. Pētniecības uzdeumi ir sekojoši: apkopot un analīzēt literatūru un statistikas datus, kas palīzdes atklāt darba aktuālitāti, izstrādāt pētījuma instrumentu, veikt pētījumu, apkopot un analīzēt iegūtus rezultātus, izstrādāt secīnājumus. Pētījuma hipotēze: Stacionārā strādājošo māsu arodslimību rašanos visbiežāk ietekmē pašu māsu nepareiza attieksme pret ergonomikas ievērošanu darbā. P…