CRIS

Permanent URI for this communityhttps://investigadores.udd.cl/handle/123456789/1

Browse

Search Results

Now showing 1 - 10 of 10

Some of the metrics are blocked by your
consent settings
Synthesis of dumbbell-like heteronanostructures encapsulated in ferritin protein: Towards multifunctional protein based opto-magnetic nanomaterials for biomedical theranostic
(2025)
Italo Moglia
;
Margarita Santiago
;
Andreas Arellano
;
Sebastián Salazar Sandoval
;
Álvaro Olivera-Nappa
Some of the metrics are blocked by your
consent settings
<i>Venus antiqua</i> Clamshell-Derived Calcium Oxide Nanoparticles for the Preparation of PLA/<scp>d</scp>-Limonene/CaO Nanocomposites with Antimicrobial Properties
(2023)
Viviana Moreno-Serna
;
Claudio Oyarzún
;
Maria T. Ulloa-Flores
;
RIVAS JIMENEZ, LINA MARIA
;
Francesca Antonella Sepúlveda
Scopus© Citations 17 3
Some of the metrics are blocked by your
consent settings
Fast and easy synthesis of silver, copper, and bimetallic nanoparticles on cellulose paper assisted by ultrasound
(2023)
Rodrigo Araya-Hermosilla
;
MARTINEZ ARENAS, JESSICA ISABEL
;
César Zúñiga Loyola
;
Sara Ramírez
;
Sebastián Salazar
Scopus© Citations 11 5
Some of the metrics are blocked by your
consent settings
Review on Generation and Characterization of Copper Particles and Copper Composites Prepared by Mechanical Milling on a Lab-Scale
(2023)
Sebastián Salazar Sandoval
;
SILVA GONZALEZ, NATALY ROXANA
<jats:p>This review aims to expose mechanical milling as an alternative method for generating copper-based particles (copper particles (CuP) and copper composites (CuC)); more specifically, via a top-down or bottom-up approach, on a lab-scale. This work will also highlight the different parameters that can affect the size distribution, the type, and the morphology of the obtained CuP or CuC, such as the type of mechanical mill, ball-to-powder ratios (BPR), the milling speed, milling time, and the milling environment, among others. This review analyzes various papers based on the Cu-based particle generation route, which begins with a pretreatment step, then mechanical milling, its approach (top-down or bottom-up), and the post-treatment. Finally, the characterization methods of the resulting CuP and CuC through mechanical milling are also discussed.</jats:p>
3Scopus© Citations 7
Some of the metrics are blocked by your
consent settings
Mechanical and Antimicrobial Polyethylene Composites with CaO Nanoparticles
(2020)
Cristián Silva
;
Felipe Bobillier
;
Daniel Canales
;
Francesca Antonella Sepúlveda
;
Alejandro Cament
<jats:p>Low-density polyethylene composites containing different sizes of calcium oxide (CaO) nanoparticles were obtained by melt mixing. The CaO nanoparticles were synthesized by either the sol-gel or sonication methods, obtaining two different sizes: ca. 55 nm and 25 nm. These nanoparticles were used either as-synthesized or were modified organically on the surface with oleic acid (Mod-CaO), at concentrations of 3, 5, and 10 wt% in the polymer. The Mod-CaO nanoparticles of 25 nm can act as nucleating agents, increasing the polymer’s crystallinity. The Young’s Modulus increased with the Mod-CaO nanoparticles, rendering higher reinforcement effects with an increase as high as 36%. The reduction in Escherichia coli bacteria in the nanocomposites increased with the amount of CaO nanoparticles, the size reduction, and the surface modification. The highest antimicrobial behavior was found in the composites with a Mod-CaO of 25 nm, presenting a reduction of 99.99%. This strong antimicrobial effect can be associated with the release of the Ca2+ from the composites, as studied for the composite with 10 wt% nanoparticles. The ion release was dependent on the size of the nanoparticles and their surface modification. These findings show that CaO nanoparticles are an excellent alternative as an antimicrobial filler in polymer nanocomposites to be applied for food packaging or medical devices.</jats:p>
17 1Scopus© Citations 36
Some of the metrics are blocked by your
consent settings
Peptide Targeted Gold Nanoplatform Carrying miR-145 Induces Antitumoral Effects in Ovarian Cancer Cells
(2022)
Edison Salas-Huenuleo
;
Andrea Hernández
;
Lorena Lobos-González
;
Iva Polakovičová
;
Francisco Morales-Zavala
<jats:p>One of the recent attractive therapeutic approaches for cancer treatment is restoring downregulated microRNAs. They play an essential muti-regulatory role in cellular processes such as proliferation, differentiation, survival, apoptosis, cell cycle, angiogenesis, and metastasis, among others. In this study, a gold nanoplatform (GNPF) carrying miR-145, a downregulated microRNA in many cancer types, including epithelial ovarian cancer, was designed and synthesized. For targeting purposes, the GNPF was functionalized with the FSH33 peptide, which provided selectivity for ovarian cancer, and loaded with the miR-145 to obtain the nanosystem GNPF-miR-145. The GNPF-mir-145 was selectively incorporated in A2780 and SKOV3 cells and significantly inhibited cell viability and migration and exhibited proliferative and anchor-independent growth capacities. Moreover, it diminished VEGF release and reduced the spheroid size of ovarian cancer through the damage of cell membranes, thus decreasing cell viability and possibly activating apoptosis. These results provide important advances in developing miR-based therapies using nanoparticles as selective vectors and provide approaches for in vivo evaluation.</jats:p>
19Scopus© Citations 10
Some of the metrics are blocked by your
consent settings
Mechanical and antimicrobial properties of low‐density‐polyethylene/
<scp>MgO</scp>
nanocomposites
(2022)
Alejandro Cament
;
Viviana Moreno‐Serna
;
Carlos Loyo
;
Pabla Quintana
;
Pablo Seura
Scopus© Citations 11 2
Some of the metrics are blocked by your
consent settings
PLA/CaO nanocomposites with antimicrobial and photodegradation properties
(2022)
Carlos Loyo
;
Viviana Moreno-Serna
;
Jairo Fuentes
;
Nicolás Amigo
;
Francesca Antonella Sepúlveda
Scopus© Citations 34 2
Some of the metrics are blocked by your
consent settings
Oxide copper nanoparticles stabilized by acrylonitrile and methyl methacrylate polar monomers through a ligand exchange reaction
(2021)
Bárbara Rodríguez
;
Sara Ramírez
;
Pablo Gutiérrez
;
SILVA GONZALEZ, NATALY ROXANA
;
Isaac Díaz-Aburto
<jats:title>Abstract</jats:title> <jats:p>This research reports the synthesis of copper oxide nanoparticles (CuONP) functionalized by the polar monomers acrylonitrile (ACN) and methyl methacrylate (MMA). The synthesis was achieved by a practical exchange ligand reaction from CuONP previously stabilized by hexadecyltrimethylammonium bromide (CTAB). The replacement of CTAB by ACN or MMA produced the functionalized nanoparticles CuONP-ACN and CuONP-MMA, respectively. The functionalized nanoparticles were characterized by ultraviolet-visible spectroscopy (UV–vis), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (SEM), dynamic light scattering (DLS), Zeta potential, x-ray diffraction (XRD), high-resolution-transmission electron microscopy (HR-TEM), and selected area electron diffraction (SAED) analysis. Changes in surface plasmon resonance (SPR) band and the functional group bands observed in UV–vis and FTIR spectra confirmed the efficient replacement of CTAB by polar monomers. Moreover, CuONP-ACN and CuONP-MMA showed a negative surface charge with spherical morphology. X-ray diffraction (XRD) analysis showed that a monoclinic CuO crystal system was formed.</jats:p>
3Scopus© Citations 6
Some of the metrics are blocked by your
consent settings
Correlation between the concentration and morphology of copper microparticles and their biocidal effect on paper sheets
(2020)
P. Contreras
;
A. Amenabar
;
V. Apablaza
;
MARTINEZ ARENAS, JESSICA ISABEL
;
R. Lavín
Scopus© Citations 3 4

CRIS

Browse

Filters

Settings

Sort By

Results per page

Search Results