Silver nanoparticles (NPs) with diameters of 5-10 nm were synthesized by using formaldehyde (HCHO) to reduce silver nitrate (AgNO3) and polyethylenemine (PEI) as a stabilizer. It was found that on the carbon-supported cupper grid (Cu/polyvinylformal (PVF)/C) and under a visible-near-infrared (VIS-NIR, 400-860 nm) lamp illuminating at about 75 degrees C for six minutes, the spherical Ag NPs self-assembled into bigger NPs, triangular nanoprisms, or structures like clock hands. On the glass slides, the NPs firstly self-assembled into spherical particles with 3-6 microm in sizes, then assembled into chain structures comprised of 3-20 spherical particles after being illuminated by the VIS-NIR lamp for about nine minutes. The violent thermal motion of the NPs after being illuminated by the VIS-NIR lamp leads to the self-assembly and the shapes of the self-assembled particles are related to the interactions between the substrates and the samples.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1166/jnn.2014.8025 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Inorganic Nanomaterials Meet the Immune System: An Intricate Balance.
Adv Healthc Mater
March 2025
Department of Pharmacy, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Cembrano 4, Genoa, 16148, Italy.
The immune system provides defense against foreign agents that are considered harmful for the organism. Inorganic nanomaterials can be recognized by the immune system as antigens, inducing an immune reaction dependent on the patient's immunological anamnesis and from several factors including size, shape, and the chemical nature of the nanoparticles. Furthermore, nanomaterials-driven immunomodulation might be exploited for therapeutic purposes, opening new horizons in oncology and beyond.
View Article and Find Full Text PDFStochastic Impact Electrochemistry of Alkanethiolate-Functionalized Silver Nanoparticles.
Small
March 2025
Neuroelectronics, Munich Institute of Biomedical Engineering, School of Computation, Information and Technology, Technical University of Munich, 80333, München, Germany.
This study uses single-impact experiments to explore how the nanoparticles' surface chemistry influences their redox activity. 20 and 40 nm-sized silver nanoparticles are functionalized with alkanethiol ligands of various chain lengths (n = 3, 6, 8, and 11) and moieties (carboxyl ─COOH / hydroxyl ─OH), and the critical role of the particle shell is systematically examined. Short COOH-terminated ligands enable efficient charge transfer, resulting in higher impact rates and fast, high-amplitude transients.
View Article and Find Full Text PDFNatural synthesis of β-glucan nanoparticles via microwave for breast cancer prevention: a study on oats-derived nanoparticles.
Nat Prod Res
March 2025
Department of Biochemistry, Indian Institute of Science, Bangalore, India.
This study investigates the antibacterial and cancer-preventive properties of β-glucan nanoparticles (GNP) synthesised from oats using microwave energy, sodium tripolyphosphate (TPP), and silver (Ag). UV-visible spectroscopy indicated a strong surface plasmon resonance peak between 220 and 250 nm for GNP. FTIR analysis identified a band at 609 cm, signifying β linkage and confirming the presence of β-glucans.
View Article and Find Full Text PDFImproving Temperature Adaptation for Food Safety: Colorimetric Nanoparticle-Based Time-Temperature Indicators (TTIs) to Detect Cumulative Temperature Disturbances.
Foods
February 2025
Centro de Microelectrónica (CMUA), Departamento de Ingeniería Eléctrica y Electrónica, Universidad de los Andes, Bogotá 111711, Colombia.
The global commitment to ending hunger by 2030 has driven Colombia to align its Sustainable Development Goals (SDGs) toward reducing food waste and ensuring access to safe, nutritious food. A critical need is monitoring cumulative temperatures across food supply networks, prioritizing products over transport or storage infrastructure. This study introduces a Functional Time-Temperature Indicator (TTI) using nanodispersions of silver (Ag) and gold (Au) nanoparticles housed in 3D-printed plant-based resin containers.
View Article and Find Full Text PDFDIA/SWATH-Mass Spectrometry Revealing Melanoma Cell Proteome Transformations with Silver Nanoparticles: An Innovative Comparative Study.
Int J Mol Sci
February 2025
Institute for Microelectronics and Microsystems (IMM), CNR, Via Monteroni, 73100 Lecce, Italy.
Melanoma is an aggressive cancer with rising incidence and high mortality rates, largely due to chemotherapy resistance and molecular dysregulation. Nanotechnology, particularly silver nanoparticles (AgNPs), has emerged as a promising therapeutic avenue because of the nanoparticles' ability to induce oxidative stress and apoptosis in cancer cells. However, conventional colloidal AgNPs lack selectivity, often causing significant damage to healthy cells.
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!