Results 31 to 40 of about 1,047,326 (236)

Direct observation of selective autophagy induction in cells and tissues by self-assembled chiral nanodevice

open access: yesNature Communications, 2018
Chiral assemblies have gained great interest for probing intracellular effects. Here, the authors report on the development of an upconversion nanoparticle-centred yolk-shell nanoparticle tetrahedron for the induction of autophagy and the monitoring of ...
Maozhong Sun   +7 more
doaj   +1 more source

Anisotropic functionalization of upconversion nanoparticles

open access: yesChemical Science, 2018
Ligand competition directs heterogeneous bio-chemistry surface and self-assembly for upconversion nanoparticles.
Wei Ren   +9 more
openaire   +4 more sources

Multi-photon polymerization using upconversion nanoparticles for tunable feature-size printing

open access: yesNanophotonics, 2023
The recent development of light-based 3D printing technologies has marked a turning point in additive manufacturing. Through photopolymerization, liquid resins can be solidified into complex objects. Usually, the polymerization is triggered by exciting a
Zhang Qianyi   +4 more
doaj   +1 more source

Multicolor Upconversion Nanoparticles for Protein Conjugation [PDF]

open access: yesTheranostics, 2013
We describe the preparation of monodisperse, lanthanide-doped hexagonal-phase NaYF4 upconverting luminescent nanoparticles for protein conjugation. Their core was coated with a silica shell which then was modified with a poly(ethylene glycol) spacer and N-hydroxysuccinimide ester groups.
Wilhelm, Stefan   +5 more
openaire   +3 more sources

Advances in highly doped upconversion nanoparticles [PDF]

open access: yesNature Communications, 2018
AbstractLanthanide-doped upconversion nanoparticles (UCNPs) are capable of converting near-infra-red excitation into visible and ultraviolet emission. Their unique optical properties have advanced a broad range of applications, such as fluorescent microscopy, deep-tissue bioimaging, nanomedicine, optogenetics, security labelling and volumetric display.
Shihui Wen   +5 more
openaire   +3 more sources

Metal Organic Frame-Upconverting Nanoparticle Assemblies for the FRET Based Sensor Detection of Bisphenol A in High-Salt Foods

open access: yesFrontiers in Bioengineering and Biotechnology, 2020
To resolve the occurrence of unfulfillable detection in high-salts foods, we used fluorescence resonant energy transfer (FRET) sensors based on nanoparticle upconversion.
Zhou Xu   +6 more
doaj   +1 more source

Novel Carbon-Based Magnetic Luminescent Nanocomposites for Multimodal Imaging

open access: yesFrontiers in Chemistry, 2020
Multifunctional nanocomposites can combine multiple functions into a single nanosystem and thus have attracted extensive interest in various fields.
Fangfang Liu   +4 more
doaj   +1 more source

Wavelength-Dependent Metal-Enhanced Fluorescence Biosensors via Resonance Energy Transfer Modulation

open access: yesBiosensors, 2023
Fluorescence can be enhanced or quenched depending on the distance between the surface of a metal nanoparticle and the fluorophore molecule. Fluorescence enhancement by nearby metal particles is called metal-enhanced fluorescence (MEF).
Seungah Lee, Seong Ho Kang
doaj   +1 more source

Low-temperature open-air synthesis of PVP-coated NaYF4:Yb,Er,Mn upconversion nanoparticles with strong red emission

open access: yesRoyal Society Open Science, 2022
Cubic (α-phase) NaYF4:Yb,Er upconversion nanoparticles (UCNPs) are uniquely suited to biophotonics and biosensing applications due to their near-infrared excitation and visible red emission (λex approx.
Lewis E. MacKenzie   +2 more
doaj   +1 more source

Upconversion Nanoparticles for Bioimaging and Regenerative Medicine [PDF]

open access: yesFrontiers in Bioengineering and Biotechnology, 2016
Nanomaterials are proving useful for regenerative medicine in combination with stem cell therapy. Nanoparticles (NPs) can be administrated and targeted to desired tissues or organs and subsequently be used in non-invasive real-time visualization and tracking of cells by means of different imaging techniques, can act as therapeutic agent nanocarriers ...
González Béjar, María   +2 more
openaire   +3 more sources

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