Characterization of Additively Formed Copper Layer by Blue Laser-Sintered Copper Nanoparticles

Author(s):  
K. Yasuda ◽  
Y. Takada ◽  
J.-M. Song
Author(s):  
Qifan Li ◽  
Zhong Lan ◽  
Jiang Chun ◽  
Shijun Lian ◽  
Rongfu Wen ◽  
...  

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4364
Author(s):  
Rutaba Amjad ◽  
Bismillah Mubeen ◽  
Syed Shahbaz Ali ◽  
Syed Sarim Imam ◽  
Sultan Alshehri ◽  
...  

The use of biomaterials in the synthesis of nanoparticles is one of the most up-to-date focuses in modern nanotechnologies and nanosciences. More and more research on green methods of producing metal oxide nanoparticles (NP) is taking place, with the goal to overcome the possible dangers of toxic chemicals for a safe and innocuous environment. In this study, we synthesized copper nanoparticles (CuNPs) using Fortunella margarita leaves’ extract, which reflects its novelty in the field of nanosciences. The visual observation of a color change from dark green to bluish green clearly shows the instant and spontaneous formation of CuNPs when the phytochemicals of F. margarita come in contact with Cu+2 ions. The synthesis of CuNPs was carried out at different conditions, including pH, temperature, concentration ratio and time, and were characterized with UV-Vis absorption spectra, scanning electron microscope (SEM) and X-ray diffraction (XRD). The UV-Vis analysis reveals the surface plasmon resonance property (SPR) of CuNPs, showing a characteristic absorption peak at 679 nm, while SEM reveals the spherical but agglomerated shape of CuNPs of the size within the range of 51.26–56.66 nm.


2020 ◽  
Vol 1 (1) ◽  
pp. 51-58
Author(s):  
Sharmila Pradhan ◽  
Rajeswori Shrestha ◽  
Khuma Bhandari

This research is focused on bio-synthesis of Copper nanoparticles (CuNPs) using lemon extract to study the effect of various parameters on synthesis and to explore antibacterial activity. The biomolecules present in lemon extract act as self reducing and stabilizing agent. The synthesis of CuNPs was found to be affected by various parameters like volume of the lemon extract, concentration of the precursor and the temperature etc. Preliminary characterization of formation of nanoparticles were done by color change and UV-visible (UV-vis) spectroscopy. Elemental composition of the prepared sample was determined via Energy Dispersive X-ray (EDX) Spectroscopy. Presence of important functional groups associated with biomolecules is well characterized by Fourier Transform Infrared spectroscopy (FTIR). Scanning Electron Microscopy (SEM ) revealed the formation agglomerated CuNPs of different shape and sizes and the X-ray diffraction pattern showed the formation of purely crystalline nature of CuNPs. Finally, agar well diffusion method showed that CuNPs have potential antibacterial activity against Gram-ve bacteria compared to Gram +ve bacteria.


Heliyon ◽  
2020 ◽  
Vol 6 (8) ◽  
pp. e04636 ◽  
Author(s):  
Suci Amaliyah ◽  
Dwika Putri Pangesti ◽  
Masruri Masruri ◽  
Akhmad Sabarudin ◽  
Sutiman Bambang Sumitro

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