Noble Metal Nanoparticles and Their (Bio) Conjugates. II. Preparation

2016 ◽  
Vol 8 (1) ◽  
pp. 86
Author(s):  
Ignác Capek
Keyword(s):  
Surface Functionalization ◽  
Near Infrared ◽  
Infrared Region ◽  
Hybrid Nanoparticles ◽  
Noble Metal Nanoparticles ◽  
Shell Nanoparticles ◽  
Digestive Ripening ◽  
Near Infrared Region ◽  
Core Shell Nanoparticles ◽  
Anisotropic Nanostructures

Hybrid nanoparticles of gold and silver can not only retain the beneficial features of both nanomaterials, but also possess unique advantages (synergism) over the other two types. Novel pseudospherical and anisotropic nanoparticles, bimetallic triangular nanoparticles, and core@shell nanoparticles were prepared by the different procedures for various applications and understanding both the particle evolution (nucleation) and nanoparticle anisotropy. Hybrid nanoparticles of gold and silver are considered to be low in toxicity, and exhibit facile surface functionalization chemistry. Furthermore, their absorption peaks are located in visible and near-infrared region. These nanoparticles provide significant plasmon tunability, chemical and surface modification properties, and significant advances in the growth into anisotropic nanostructures. The photoinduced synthesis can be used to prepare various (sub) nanoparticles and OD and 1D nanoparticles. Ostwald and digestive ripening provided narrower particle size distribution.

Surface functionalization of Ta4C3 MXene for broadband ultrafast photonics in the near-infrared region

2022 ◽  
Vol 26 ◽  
pp. 101341
Author(s):  
Li Dong ◽  
Hongwei Chu ◽  
Ying Li ◽  
Xiaoyang Ma ◽  
Han Pan ◽  
...  
Keyword(s):  
Surface Functionalization ◽  
Near Infrared ◽  
Infrared Region ◽  
Near Infrared Region ◽  
Ultrafast Photonics

Cyto/hemocompatible magnetic hybrid nanoparticles (Ag2S–Fe3O4) with luminescence in the near-infrared region as promising theranostic materials

2015 ◽  
Vol 133 ◽  
pp. 198-207 ◽  
Author(s):  
Ibrahim Hocaoglu ◽  
Didar Asik ◽  
Gulen Ulusoy ◽  
Christian Grandfils ◽  
Isaac Ojea-Jimenez ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Region ◽  
Hybrid Nanoparticles ◽  
Near Infrared Region

scholarly journals Chitosan-Stabilized Noble Metal Nanoparticles: Study of their Shape Evolution and Post-Functionalization Properties

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 224
Author(s):  
Massimo Ottonelli ◽  
Stefania Zappia ◽  
Anna Demartini ◽  
Marina Alloisio
Keyword(s):  
Noble Metal ◽  
Near Infrared ◽  
Infrared Region ◽  
Noble Metal Nanoparticles ◽  
Shape Evolution ◽  
Gold Silver ◽  
Application Fields ◽  
Highly Porous ◽  
Very High ◽  
Anisotropic Nanostructures

Noble metal anisotropic nanostructures have achieved a growing interest in both academic and industrial domains mostly because of their shape-dependent plasmonic properties in the near-infrared region. In this paper, gold and gold-silver anisotropic nanostructures were synthesized in very high shape-yields through a wet, seed-mediated approach based on the use of nearly spherical silver nanoparticles as seeds and chitosan as stabilizing agent. Two chitosans of different origin and molecular properties were selected for the synthetic pathway, leading to the formation of variously sized and shaped end products. In detail, quite homogeneous nanoplatelets of about 25-nm size and 7-nm thickness or nearly spherical, highly porous nanocages of about 50-nm size were obtained, depending on the type of polysaccharide employed. The shape transition towards anisotropic morphologies occurred through a slow, spontaneous process, in which the chitosan nature seemed to play a key role. As expected, both nanoplatelets and nanocages exhibit shape-dependent plasmonic features and surface properties tunable for a variety of application fields. To prove this point, the nanostructures were successfully post-functionalized with poly(10,12-pentacosadiynoic acid) (PCDA), a carboxylic-endowed diacetylene able to anchor on noble metal substrates, to obtain versatile, chromic platforms suitable for sensing and spectroscopic purposes.

Ligand Influence Versus Electronic Configuration of d-metal Ion in Determining the Fate of NIR Emission from LnIII Ions: A Case Study with CuII, NiII and ZnII Complexes.

2021 ◽  
Author(s):  
Abhineet Verma ◽  
Sk Saddam Hossain ◽  
Sailaja S Sunkari ◽  
Joseph Reibenspies ◽  
Satyen Saha
Keyword(s):  
Metal Ion ◽  
Selection Rule ◽  
Near Infrared ◽  
Electronic Configuration ◽  
Infrared Region ◽  
Direct Excitation ◽  
Characteristic Emission ◽  
Nir Emission ◽  
Near Infrared Region

Lanthanides (LnIII) are well known for their characteristic emission in the Near-Infrared Region (NIR). However, direct excitation of lanthanides is not feasible as described by Laporte’s parity selection rule. Here,...

Highly luminescent InP-In(Zn)P/ZnSe/ZnS core/shell/shell colloidal quantum dots with tunable emission synthesized based on growth-doping

2021 ◽  
Author(s):  
Cong Shen ◽  
Yan Qing Zhu ◽  
Zixiao Li ◽  
Jingling Li ◽  
Hong Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Infrared Region ◽  
Colloidal Quantum Dots ◽  
High Quality ◽  
Promising Alternative ◽  
Lower Toxicity ◽  
Near Infrared Region ◽  
Inp Quantum Dots ◽  
Tunable Emission

InP quantum dots (QDs) are considered as the most promising alternative to Cd-based QDs with the lower toxicity and emission spectrum tunability ranging from visible to near-infrared region. Although high-quality...

Evaluation of melon drying using hyperspectral imaging technique in the near infrared region

LWT ◽  
2021 ◽  
Vol 143 ◽  
pp. 111092
Author(s):  
Jose Marcelino S. Netto ◽  
Fernanda A. Honorato ◽  
Patrícia M. Azoubel ◽  
Louise E. Kurozawa ◽  
Douglas F. Barbin
Keyword(s):  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Imaging Technique ◽  
Infrared Region ◽  
Near Infrared Region
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