Related Experiment Video
Updated: Jan 29, 2026
Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
Facile Synthesis and In Vitro Biological Screening of Pd@SiO₂ Core-Shell Nanoparticles
K Rajasekar1, A Dinesh2, M Durka3
1Postgraduate and Research Department of Zoology, Khadir Mohideen College, Adirampattinam, Thanjavur 614701, Tamil Nadu, India.
Abstract:
In this study, semiconductor core-shell Pd@SiO₂ nanoparticles (NPs) were prepared by Stober's method. The prepared final products were characterized by XRD, FT-IR, SEM, HR-TEM and EDX techniques. Cell viability of Pd@SiO₂ NPs against HeLa cell line was screened by MTT assay. The present study indicates that the core-shell Pd@SiO₂ NPs are extremely stable along with very high photodynamic efficiency under LED light illumination. The antibacterial activities of core- shell Pd@SiO₂ NPs were determined with Escherichia coli and Staphylococcus aureus by agar diffusion method. DNA binding affinity of the core-shell Pd@SiO₂ NPs towards CT-DNA was also investigated. The observed results showed that SiO₂ supported on the surface of Pd NPs not only prevented aggregation, but also proved the enhanced antimicrobial and DNA binding propensities than the free Pd NPs.
Related Concept Videos
02:10The Nucleosome Core Particle
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
01:12The Nucleosome Core Particle
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
01:26PD Controller: Design
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...
01:07Time-Domain Interpretation of PD Control
Consider the example of control of motor torque. Initially, a positive...
01:57What is Conservation Biology?
01:15Dehydration Synthesis
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...