Designing active mats based on cellulose acetate/polycaprolactone core/shell structures with different release kinetics

Surface-enhanced Raman scattering (SERS) is a powerful tool in charge transfer (CT) process research. By analyzing the relative intensity of the characteristic bands in the bridging molecules, one can obtain detailed information about the CT between two materials. Herein, we synthesized a series of Au nanorods (NRs) with different length-to-diameter ratios (L/Ds) and used these Au NRs to prepare a series of core–shell structures with the same Cu2O thicknesses to form Au NR–4-mercaptobenzoic acid (MBA)@Cu2O core–shell structures. Surface plasmon resonance (SPR) absorption bands were adjusted by tuning the L/Ds of Au NR cores in these assemblies. SERS spectra of the core-shell structure were obtained under 633 and 785 nm laser excitations, and on the basis of the differences in the relative band strengths of these SERS spectra detected with the as-synthesized assemblies, we calculated the CT degree of the core–shell structure. We explored whether the Cu2O conduction band and valence band position and the SPR absorption band position together affect the CT process in the core–shell structure. In this work, we found that the specific surface area of the Au NRs could influence the CT process in Au NR–MBA@Cu2O core–shell structures, which has rarely been discussed before.

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Template-free synthesis of ordered ZnO@ZnS core–shell arrays for high performance supercapacitors

Dalton Transactions ◽

10.1039/c6dt03435g ◽

2016 ◽

Vol 45 (44) ◽

pp. 17980-17986 ◽

Cited By ~ 23

Author(s):

Hailong Yan ◽

Tong Li ◽

Yang Lu ◽

Jinbing Cheng ◽

Tao Peng ◽

...

Keyword(s):

High Performance ◽

Shell Structures ◽

Core Shell ◽

Template Free

In this article, ordered ZnO@ZnS core–shell structures have been produced on a stainless mesh by a two-step approach without using a template.

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Synthesis and characterisation of core–shell structures for orthopaedic surgery

Journal of Biomechanics ◽

10.1016/j.jbiomech.2007.05.002 ◽

2007 ◽

Vol 40 (15) ◽

pp. 3349-3353 ◽

Cited By ~ 3

Author(s):

Edina Rusen ◽

Cătălin Zaharia ◽

Teodora Zecheru ◽

Bogdan Mărculescu ◽

Robert Filmon ◽

...

Keyword(s):

Orthopaedic Surgery ◽

Shell Structures ◽

Core Shell

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In situ electropolymerised silica–polyaniline core–shell structures: Electrode modification and enzyme biosensor enhancement

Electrochimica Acta ◽

10.1016/j.electacta.2006.07.051 ◽

2007 ◽

Vol 52 (5) ◽

pp. 1865-1870 ◽

Cited By ~ 32

Author(s):

Xiliang Luo ◽

Anthony J. Killard ◽

Aoife Morrin ◽

Malcolm R. Smyth

Keyword(s):

Shell Structures ◽

Core Shell ◽

Electrode Modification ◽

Enzyme Biosensor

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Coordination polymer core/shell structures: Preparation and up/down-conversion luminescence

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2016.06.038 ◽

2016 ◽

Vol 479 ◽

pp. 15-19 ◽

Cited By ~ 3

Author(s):

Bingmei Li ◽

Hualan Xu ◽

Chen Xiao ◽

Min Shuai ◽

Weimin Chen ◽

...

Keyword(s):

Coordination Polymer ◽

Shell Structures ◽

Core Shell ◽

Down Conversion

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Polymer-assisted synthesis of aligned amorphous silicon nanowires and their core/shell structures with Au nanoparticles

Chemical Physics Letters ◽

10.1016/j.cplett.2004.08.099 ◽

2004 ◽

Vol 397 (1-3) ◽

pp. 128-132 ◽

Cited By ~ 1

Author(s):

Xing-bin Yan ◽

Tao Xu ◽

Shan Xu ◽

Gang Chen ◽

Qun-ji Xue ◽

...

Keyword(s):

Amorphous Silicon ◽

Silicon Nanowires ◽

Au Nanoparticles ◽

Shell Structures ◽

Core Shell

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Synthesis and Characterization of a Fe3O4@PNIPAM-Chitosan Nanocomposite and Its Potential Application in Vincristine Delivery

Polymers ◽

10.3390/polym13111704 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1704

Author(s):

Cynthia N. Hernández-Téllez ◽

Ana G. Luque-Alcaraz ◽

Maribel Plascencia-Jatomea ◽

Hiram J. Higuera-Valenzuela ◽

Mabeth Burgos-Hernández ◽

...

Keyword(s):

Fe3o4 Nanoparticles ◽

Release Kinetics ◽

Magnetic Core ◽

Systematic Evaluation ◽

Solution Temperature ◽

Core Shell ◽

Particle Size And Morphology ◽

Size And Morphology ◽

Thermomagnetic Properties ◽

Release Model

In this research, we conducted a systematic evaluation of the synthesis parameters of a multi-responsive core-shell nanocomposite (Fe3O4 nanoparticles coated by poly(N-isopropylacrylamide) (PNIPAM) in the presence of chitosan (CS) (Fe3O4@PNIPAM-CS). Scanning electron microscopy (SEM) was used to follow the size and morphology of the nanocomposite. The functionalization and the coating of Fe3O4 nanoparticles (Nps) were evaluated by the ζ-potential evolution and Fourier Transform infrared spectroscopy (FTIR). The nanocomposite exhibited a collapsed structure when the temperature was driven above the lower critical solution temperature (LCST), determined by dynamic light scattering (DLS). The LCST was successfully shifted from 33 to 39 °C, which opens the possibility of using it in physiological systems. A magnetometry test was performed to confirm the superparamagnetic behavior at room temperature. The obtained systems allow the possibility to control specific properties, such as particle size and morphology. Finally, we performed vincristine sulfate loading and release tests. Mathematical analysis reveals a two-stage structural-relaxation release model beyond the LCST. In contrast, a temperature of 25 °C promotes the diffusional release model. As a result, a more in-depth comprehension of the release kinetics was achieved. The synthesis and study of a magnetic core-shell nanoplatform offer a smart material as an alternative targeted release therapy due to its thermomagnetic properties.

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