Synthesis of dual-functional Ag/Au nanoparticles based on the decreased cavitating rate under alkaline conditions and the colorimetric detection of mercury(ii) and lead(ii)

2018 ◽  
Vol 6 (28) ◽  
pp. 7557-7567 ◽  
Author(s):  
Ting-Yang Xing ◽  
Jing Zhao ◽  
Guo-Jun Weng ◽  
Jian-Jun Li ◽  
Jian Zhu ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Colorimetric Detection ◽  
Core Shell ◽  
Specific Detection ◽  
Shell Nanoparticles ◽  
Dual Functional ◽  
Alkaline Conditions ◽  
Core Shell Nanoparticles

Synthesis of Ag/Au core–shell nanoparticles with two LSPR modes and the specific detection of Hg2+and Pb2+.

scholarly journals Magneto-Optical Characteristics of Streptavidin-Coated Fe3O4@Au Core-Shell Nanoparticles for Potential Applications on Biomedical Assays

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Chin-Wei Lin ◽  
Jian-Ming Chen ◽  
You-Jun Lin ◽  
Ling-Wei Chao ◽  
Sin-Yi Wei ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Faraday Effect ◽  
Au Nanoparticles ◽  
Optical Characteristics ◽  
Enzyme Linked Immunosorbent Assay ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Time Resolved ◽  
Biotechnology Research ◽  
Core Shell Nanoparticles

Abstract Recently, gold-coated magnetic nanoparticles have drawn the interest of researchers due to their unique magneto-plasmonic characteristics. Previous research has found that the magneto-optical Faraday effect of gold-coated magnetic nanoparticles can be effectively enhanced because of the surface plasmon resonance of the gold shell. Furthermore, gold-coated magnetic nanoparticles are ideal for biomedical applications because of their high stability and biocompatibility. In this work, we synthesized Fe3O4@Au core-shell nanoparticles and coated streptavidin (STA) on the surface. Streptavidin is a protein which can selectively bind to biotin with a strong affinity. STA is widely used in biotechnology research including enzyme-linked immunosorbent assay (ELISA), time-resolved immunofluorescence (TRFIA), biosensors, and targeted pharmaceuticals. The Faraday magneto-optical characteristics of the biofunctionalized Fe3O4@Au nanoparticles were measured and studied. We showed that the streptavidin-coated Fe3O4@Au nanoparticles still possessed the enhanced magneto-optical Faraday effect. As a result, the possibility of using biofunctionalized Fe3O4@Au nanoparticles for magneto-optical biomedical assays should be explored.

Sensitive colorimetric detection of glucose and cholesterol by using Au@Ag core–shell nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 35001-35007 ◽  
Author(s):  
Xuehong Zhang ◽  
Min Wei ◽  
Bingjing Lv ◽  
Yuanjian Liu ◽  
Xu Liu ◽  
...  
Keyword(s):  
Colorimetric Detection ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Sensitive colorimetric detection of glucose and cholesterol by using Au@Ag core–shell nanoparticles.

A novel method to modify the color of VO2-based thermochromic smart films by solution-processed VO2@SiO2@Au core–shell nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47249-47257 ◽  
Author(s):  
Xuanming Lu ◽  
Xiudi Xiao ◽  
Ziyi Cao ◽  
Yongjun Zhan ◽  
Haoliang Cheng ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Solution Process ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Solution Processed ◽  
Novel Method ◽  
Core Shell Nanoparticles ◽  
Color Modification

A facile solution process was developed to prepare VO2@SiO2@Au nanoparticles for color modification of VO2-based smart films.

Synthesis of Co@Au Core-Shell Nanoparticles in Non-Aqueous Solution and their Characterization

2004 ◽  
Vol 818 ◽  
Author(s):  
Zhihui Ban ◽  
C. J. O'Connor
Keyword(s):  
Aqueous Solution ◽  
Quantum Interference ◽  
Au Nanoparticles ◽  
Magnetic Measurements ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Shell Nanoparticles ◽  
Transmission Electron ◽  
Average Size ◽  
Core Shell Nanoparticles

AbstractA homogeneous non-aqueous solution reactions method has been developed to prepare gold-coated cobalt (Co@Au) nanoparticles. After the sample was washed with 8% HCl, XRD (X-Ray Diffraction), TEM (transmission electron microscopy), and magnetic measurements SQUID (Superconducting Quantum Interference Device) are utilized to characterize the nanocomposites. XRD shows the pattern of sample, which is responding to gold and cobalt, no cobalt oxide was found. TEM results show that the average size of Co@Au nanoparticles is about 10 nm and we can find core-shell structure of the sample. SQUID results show that the particles are ferromagnetic materials at 300K. So the gold- coated cobalt nanoparticles (Co@Au) can be successfully prepared by the homogeneous nonaqueous approach. This kind of core-shell materials is stable in acid condition, which would give many opportunities for bio- application.

scholarly journals Controllable Engineering and Functionalizing Nanoparticles with Specific Targeting Capability

2021 ◽  
Author(s):  
Zhanchen Guo ◽  
Rongrong Xing ◽  
Zhen Liu
Keyword(s):  
Breast Cancer ◽  
Biomedical Applications ◽  
High Specificity ◽  
Superparamagnetic Nanoparticles ◽  
Breast Cancer Cell Lines ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Specific Targeting ◽  
Dual Functional ◽  
Core Shell Nanoparticles

Abstract Due to unique properties, nanoparticles been widely used in important biomedical applications such as imaging, drug delivery and disease therapy. Targeting toward specific proteins is essential for the effective utilization of nanoparticles. However, current targeting strategies mainly rely on surface modification with bio-ligands, which often not only fail to provide desired properties but also remain challenging. Here we report an unprecedented approach, called reverse microemulsion-confined epitope-oriented surface imprinting and cladding (ROSIC), for facile, versatile and controllable engineering coreless and core/shell nanoparticles with tunable monodispersed size as well as specific targeting capability towards proteins and peptides. Via engineering coreless imprinted and cladded silica nanoparticles, the effectiveness and superiority over conventional imprinting of the proposed approach was first verified. The prepared nanoparticles exhibited both high specificity and high affinity. Using quantum dots (QDs), superparamagnetic nanoparticles, silver nanoparticles and upconverting nanoparticles as a representative set of core substrates, a variety of dual-functional single-core/shell nanoparticles were then successfully prepared. Finally, selective fluorescence imaging of triple negative breast cancer cells over other breast cancer cell lines using QD-cored nanoparticles was achieved, which well demonstrated the potential of the prepared core/shell nanoparticles in biomedical applications. Thus, this approach opened a new avenue to engineering and functionalization of advanced nanoparticles with targeting capability, holding great prospects in biomedical applications.

scholarly journals Counterion coupled (COCO) gemini surfactant capped Ag/Au alloy and core–shell nanoparticles for cancer therapy

RSC Advances ◽  
2019 ◽  
Vol 9 (65) ◽  
pp. 37830-37845 ◽  
Author(s):  
A. Mohammed Siddiq ◽  
Ramar Thangam ◽  
Balaraman Madhan ◽  
Md. Sayem Alam
Keyword(s):  
Dna Damage ◽  
Cancer Therapy ◽  
Cancer Cell ◽  
Cell Apoptosis ◽  
Gemini Surfactant ◽  
Au Nanoparticles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Cancer Cell Apoptosis ◽  
Core Shell Nanoparticles

In this work hybrid silver (Ag)–gold (Au) nanoparticles (NPs) with different sizes and compositions were synthesized and applied for anticancer evaluations and which is effectively involved in cancer cell apoptosis through DNA damage.

Dual functional NaYF4:Yb3+, Er3+@NaYF4:Yb3+, Nd3+core–shell nanoparticles for cell temperature sensing and imaging

2018 ◽  
Vol 29 (9) ◽  
pp. 094001 ◽  
Author(s):  
Zengliang Shi ◽  
Yue Duan ◽  
Xingjun Zhu ◽  
Qiwei Wang ◽  
DongDong Li ◽  
...  
Keyword(s):  
Temperature Sensing ◽  
Core Shell ◽  
Cell Temperature ◽  
Shell Nanoparticles ◽  
Dual Functional ◽  
Core Shell Nanoparticles

A novel Co@Au structure formed in bimetallic core@shell nanoparticles

2015 ◽  
Vol 51 (40) ◽  
pp. 8442-8445 ◽  
Author(s):  
Alvaro Mayoral ◽  
Daniel Llamosa ◽  
Yves Huttel
Keyword(s):  
Au Nanoparticles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
The Core ◽  
New Type ◽  
Core Shell Nanoparticles

A new type of core–shell Co@Au nanoparticles is reported here, where the core is formed by a Co icosahedron surrounded by fcc Au facets.

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