This paper describes the preparation of gold nanoparticles passivated with different tiopronin-like thiol peptide derivatives. The average size of these gold particles falls into the range of 1.7-2.1 nm with narrow dispersity. All the gold nanoparticles exhibit near-IR luminescence in the spectral range of 700-950 nm. The luminescence properties of the gold nanoparticles depend on the structure of the capping ligands; those capped with polar thiol peptides give weaker luminescence in water. Reducing the packing efficiency of the passivating layer by bulky ligands is likely to facilitate the luminescence quenching effects of foreign quenchers and hence weaken the luminescence of the gold nanoparticles.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1166/jnn.2009.se30 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluation of Mesoporous Silica Nanoparticles as Carriers of Triarylmethyl Radical Spin Probes for EPR Oximetry.
J Phys Chem B
January 2025
Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506, United States.
measurement and mapping of oxygen levels within the tissues are crucial in understanding the physiopathological processes of numerous diseases, such as cancer, diabetes, or peripheral vascular diseases. Electron paramagnetic resonance (EPR) associated with biocompatible exogenous spin probes, such as Ox071 triarylmethyl (TAM) radical, is becoming the new gold standard for oxygen mapping in preclinical settings. However, these probes do not show tissue selectivity when injected systemically, and they are not cell permeable, reporting oxygen from the extracellular compartment only.
View Article and Find Full Text PDFSite-Selective and High-Density Gold Nanoparticle Photodeposition on the Edges of ZnO Nanowires.
J Phys Chem Lett
January 2025
Graduate School of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan.
Selective modification of chemically active sites on supports, such as steps, edges, and corners, with metal nanoparticles (NPs) is a challenging topic in the fields of catalysis and photocatalysis. However, the formation of site-selective, high-density metal NPs on a support has not yet been achieved. Radial ZnO mesocrystals composed of hexagonal nanowires (NWs) with {101̅0} sidewalls were synthesized by a simple solution-phase method.
View Article and Find Full Text PDFEmerging of Ultrafine Membraneless Organelles as the Missing Piece of Nanostress: Mechanism of Biogenesis and Implications at Multilevels.
ACS Nano
January 2025
Department of Pharmaceutics, and Nanjing Medical University, Nanjing 211166, P. R. China.
Understanding the interaction between nanomaterials and cellular structures is crucial for nanoparticle applications in biomedicine. We have identified a subtype of stress granules, called nanomaterial-provoked stress granules (NSGs), induced by gold nanorods (AuNRs). These NSGs differ from traditional SGs in their physical properties and biological functions.
View Article and Find Full Text PDFChemospecific Heterostructure and Heteromaterial Assembly of Metal-Organic Framework Nanoparticles.
J Am Chem Soc
January 2025
EaStCHEM School of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K.
Nanoparticles of highly porous metal-organic frameworks (MOFs) are some of the most exciting nanomaterials under development, with potential applications that range from biomedicine and catalysis to adsorption technologies. However, our synthetic methodologies to functionalize and manipulate MOF nanoparticles (NPs) are less well developed than they might be. Here we create MOF NPs derivatized with hydrazone units on their exterior, enabling chemospecific reversible dynamic covalent modification of structures on the external surface.
View Article and Find Full Text PDFSub-5 nm Silicon Nanopore Sensors: Scalable Fabrication via Self-Limiting Metal-Assisted Chemical Etching.
ACS Appl Mater Interfaces
January 2025
Division of Micro and Nanosystems, KTH Royal Institute of Technology, Malvinas väg 10, Stockholm 100 44, Sweden.
Solid-state nanopores offer unique possibilities for biomolecule sensing; however, scalable production of sub-5 nm pores with precise diameter control remains a manufacturing challenge. In this work, we developed a scalable method to fabricate sub-5 nm nanopores in silicon (Si) nanomembranes through metal-assisted chemical etching (MACE) using gold nanoparticles. Notably, we present a previously unreported self-limiting effect that enables sub-5 nm nanopore formation from both 10 and 40 nm nanoparticles in the 12 nm thick monocrystalline device layer of a silicon-on-insulator substrate.
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!