AI Article Synopsis
- Researchers developed a magneto-photonic device using a low one-photon absorption (LOPA) direct laser writing (DLW) technique on a nanocomposite made of magnetite (Fe3O4) nanoparticles mixed with SU-8 photoresist.
- The dispersion of Fe3O4 nanoparticles varied based on their concentration, the viscosity of the SU-8 resist, and the mixing duration, with the optimal homogeneity achieved at 2 wt% concentration and a 20-day mixing period.
- The LOPA-based DLW enabled the creation of submicrometer magneto-photonic structures as small as 150 nm, showcasing strong magnetic field responses and potential applications as micro-actuators in liquid environments.
Article Abstract
We report on the fabrication of desired magneto-photonic devices by a low one-photon absorption (LOPA) direct laser writing (DLW) technique on a photocurable nanocomposite consisting of magnetite ( Fe 3 O 4 ) nanoparticles and a commercial SU-8 photoresist. The magnetic nanocomposite was synthesized by mixing Fe 3 O 4 nanoparticles with different kinds of SU-8 photoresists. We demonstrated that the degree of dispersion of Fe 3 O 4 nanoparticles in the nanocomposite depended on the concentration of Fe 3 O 4 nanoparticles, the viscosity of SU-8 resist, and the mixing time. By tuning these parameters, the most homogeneous magnetic nanocomposite was obtained with a concentration of about 2 wt % of Fe 3 O 4 nanoparticles in SU-8 2005 photoresist for the mixing time of 20 days. The LOPA-based DLW technique was employed to fabricate on demand various magneto-photonic submicrometer structures, which are similar to those obtained without Fe 3 O 4 nanoparticles. The magneto-photonic 2D and 3D structures with sizes as small as 150 nm were created. We demonstrated the strong magnetic field responses of the magneto-photonic nanostructures and their use as micro-actuators when immersed in a liquid solution.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449986 | PMC |
| http://dx.doi.org/10.3390/nano7050105 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enhanced Light-Matter Interaction with Bloch Surface Wave Modulated Plasmonic Nanocavities.
Nano Lett
January 2025
State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, 100871 Beijing, China.
Strong coupling between nanocavities and single excitons at room temperature is important for studying cavity quantum electrodynamics. However, the coupling strength is highly dependent on the spatial light-confinement ability of the cavity, the number of involved excitons, and the orientation of the electric field within the cavity. By constructing a hybrid cavity with a one-dimensional photonic crystal cavity and a plasmonic nanocavity, we effectively improve the quality factor, reduce the mode volume, and control the direction of the electric field using Bloch surface waves.
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
The Miami Project to Cure Paralysis, Miami, FL, USA.
Background: Stroke and AD patients with gut complications often present worsened neurological outcomes. The goal of this study was to examine the role of extracellular vesicle (EV)-mediated pyroptosis in the bi-directional gut-brain axis after photothrombotic stroke (PTS) in aged 3xTg mice and wildtype (WT) controls.
Method: Twelve-month 3xTg and WT male and female mice underwent PTS using a YAG laser.
Basic Science and Pathogenesis.
Alzheimers Dement
December 2024
NYU Grossman School of Medicine, New York, NY, USA.
Background: Prevalence of epilepsy is increased among Alzheimer's Disease (AD) patients and cognitive impairment is common among people with epilepsy, with seizures occurring in 10-22% of AD patients, subclinical epileptiform abnormalities in 22-54% of AD patients, and cognitive deficits in up to 80% of epilepsy patients. These shared pathophysiological changes remain poorly defined.
Methods: We aimed to identify protein differences associated with epilepsy and AD using published proteomics datasets, including our previous analysis in epilepsy hippocampus and from our searchable database of 38 AD proteomics studies (NeuroPro).
Microleakage under metal and ceramic brackets after acid etch or laser surface treatment before bonding: An in vitro study.
J Orthod
January 2025
Department of Oral Biology, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt.
Aim: To compare microleakage beneath ceramic and metal brackets prepared with either acid etching or laser conditioning.
Design: An in vitro study.
Setting: Department of Orthodontics, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt.
Improving Septicemia Diagnostics: A Comparative Analysis of Direct and Post-Culture MALDI-TOF MS Methods for Bacterial Identification.
Tunis Med
December 2024
Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco.
Introduction: Bloodstream infections are serious conditions requiring precise bacterial identification for effective treatment. Traditional culture-based methods, while reliable, are time-consuming. The direct identification method by MALDI-TOF MS promises rapid and accurate identification directly from positive blood cultures.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!