EMC Abstracts

Official abstracts site for the European Microscopy Congress

MENU 
  • Home
  • Meetings Archive
    • The 16th European Microscopy Congress 2016
  • Keyword Index
  • Your Favorites
    • Favorites
    • Login
    • Register
    • View and Print All Favorites
    • Clear all your favorites
  • Advanced Search

Playing around with shape and composition of nanoparticles for various applications

Abstract number: 5959

Session Code: MS00-OP184

DOI: 10.1002/9783527808465.EMC2016.5959

Meeting: The 16th European Microscopy Congress 2016

Session: Materials Science

Topic: Nanoparticles: from synthesis to applications

Presentation Form: Oral Presentation

Corresponding Email: magdalena.parlinska@ifj.edu.pl

Magdalena Parlinska-Wojtan (1), Grzegorz Gruzel (1), Elzbieta Roga (1), Joanna Depciuch (1), Andrzej Kowal (1)

1. Department of Soft Matter Research, Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Pologne

Keywords: 3-D nanoparticles, antibacterial activity, green synthesis, nanocatalysts, PtRh/SnO2, silver nanoparticles

Nowadays, nanoparticles with sizes between 2 to 50 nm become more and more popular, because they can be applied in various fields such as materials science, chemistry, catalysis, medicine or biology. In particular nanoparticles with fancy shapes gain a lot of attention, also because of the low-cost synthesis methods. This study is focused on several types of catalytic nanoparticles (NPs), silver nanoparticles synthesized using green chemistry methods and in particular on their morphological and chemical analysis using HR(TEM). Three-dimensional (3D) catalysts [1] being promising for application in fuel cells were studied. These nanoparticles have a dodecahedron shape with Pt skin at the edges and a Ni core, Figure 1(a). When etching away the core, the remaining empty Pt frame offers a much larger active surface compared to spherical nanoparticles. The morphology of these 3D PtNi particles strongly depends on the synthesis parameters allowing fabricating dodecahedrons, Figure 1(a), core-shell or even dendritic structures, Figure 1(b).

SnO2 nanoparticles are excellent supports for noble metal NPs, as their combination exhibits good catalytic activity towards ethanol oxidation reaction [2]. Various synthesis routes including polyol and microwave assisted methods allowed producing different SnO2 NPs, Figure 2(a). The break of the C=C bond in the ethanol molecule occurs at the interface between PtRh and SnO2 particles, Figure 2(b). Therefore their physical contact is imperative for the effectiveness of the catalyst. Structural aspects and chemical analysis by TEM characterization techniques of the PtRh/SnO2/C catalysts were analyzed.

Green synthesis method using camomile extract was applied to synthesize silver nanoparticles in order to tune their antibacterial properties merging the synergistic effect of camomile and Ag [3]. Scanning transmission electron microscopy (STEM) revealed that camomile extract (CE) consisted of porous globular nanometer sized structures, which were a perfect support for Ag nanoparticles, Figure 3(a). The Ag nanoparticles synthesized with the camomile extract (AgNPs/CE) of 7 nm average size, were uniformly distributed on the CE support, Figure 3(b). The EDX chemical analysis showed that camomile terpenoids, Figure 3(c) act as a capping and reducing agent being adsorbed on the surface of AgNPs/CE, Figure 3(d), enabling their reduction from Ag+ and preventing them from agglomeration. Antibacterial tests using four bacteria strains, showed that the AgNPs/CE performed five times better compared to CE and AgNPs/G samples, reducing totally all the bacteria in 2 hours, Figure 4.

 

References

  1. C. Chen, Y. Kang, Z.Huo, Z. Zhu, W. Huang, H.L. Xin, J.D. Snyder, D. Li, J.A. Herron, M. Mavrikakis, M. Chi, K.L. More, Y. Li, N.M. Markovic, G.A. Somorjai, P. Yang, V.R. Stamenkovic, Science 343 (2014) 1339-1343.
  1. A. Kowal, M. Li, M. Shao, K. Sasaki, M.B. Vukmirovic, J. Zhang, N.S. Marinkovic, P. Liu, A.I. Frenkel and R.R. Adzic, Nature Materials 9 (2009) 325-330.
  2. M. Parlinska-Wojtan, M. Kus-Liskiewicz, J. Depciuch, and O. Sadik submitted to Bioprocess and Biosystems Engineering.

Acknowledgements

We thank the Center for Innovation and Transfer of Natural Sciences and Engineering Knowledge of the University of Rzeszow and the Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, of the Silesian University of Technology in Poland for using the TEM instruments. Financial support from the Polish National Science Centre (NCN), grant UMO-2014/13/B/ST5/04497 is acknowledged.

Figures:

Figure 1 STEM HAADF images of PtRh: (a) Dodecahedrons; (b) Dendritic nanoparticles.

Figure 2 STEM HAADF images of: (a) SnO2 NPs synthesized using microwave assisted method; (b) PtRh NPs (white, small dots) on SnO2 supports (large, grey islands).

Figure 3 STEM HAADF images of: (a) camomile support with the; (b) Ag NPs on camomile support synthesized using green chemistry method; Corresponding EDX maps of: (c) phosphorus in camomile support; (d) Ag, O and P distribution in Ag NPs/CE.

Figure 4 Percentage of microorganism (S.aureus) reduction after exposition to: AgNPs/G (blue) and AgNPs/CE (green) nanosuspensions.

To cite this abstract:

Magdalena Parlinska-Wojtan, Grzegorz Gruzel, Elzbieta Roga, Joanna Depciuch, Andrzej Kowal; Playing around with shape and composition of nanoparticles for various applications. The 16th European Microscopy Congress, Lyon, France. https://emc-proceedings.com/abstract/playing-around-with-shape-and-composition-of-nanoparticles-for-various-applications/. Accessed: May 17, 2022
  • Tweet
  • Email
  • Print
Save to PDF

« Back to The 16th European Microscopy Congress 2016

EMC Abstracts - https://emc-proceedings.com/abstract/playing-around-with-shape-and-composition-of-nanoparticles-for-various-applications/

Most Viewed Abstracts

  • mScarlet, a novel high quantum yield (71%) monomeric red fluorescent protein with enhanced properties for FRET- and super resolution microscopy
  • 3D structure and chemical composition reconstructed simultaneously from HAADF-STEM images and EDS-STEM maps
  • Pixelated STEM detectors: opportunities and challenges
  • Layer specific optical band gap measurement at nanoscale in MoS2 and ReS2 van der Waals compounds by high resolution electron energy loss spectroscopy
  • Developments in unconventional dark field TEM for characterising nanocatalyst systems

Your Favorites

You can save and print a list of your favorite abstracts by clicking the “Favorite” button at the bottom of any abstract. View your favorites »

Visit Our Partner Sites

The 16th European Microscopy Congress

The official web site of the 16th European Microscopy Congress.

European Microscopy Society

European Microscopy Society logoThe European Microscopy Society (EMS) is committed to promoting the use and the quality of advanced microscopy in all its aspects in Europe.

International Federation of Societies for Microscopy

International Federation of Societies for Microscopy logoThe IFSM aims to contribute to the advancement of microscopy in all its aspects.

Société Française des Microscopies

Société Française des MicroscopiesThe Sfµ is a multidisciplinary society which aims to improve and spread the knowledge about Microscopy.

Connect with us

Imaging & Microscopy
Official Media Partner of the European Microscopy Society.

  • Help & Support
  • About Us
  • Cookies & Privacy
  • Wiley Job Network
  • Terms & Conditions
  • Advertisers & Agents
Copyright © 2022 John Wiley & Sons, Inc. All Rights Reserved.
Wiley
loading Cancel
Post was not sent - check your email addresses!
Email check failed, please try again
Sorry, your blog cannot share posts by email.