scholarly journals A Simple Approach for the Synthesis of Gold Nanoparticles Mediated by Layered Double Hydroxide

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Aires da Conceição Silva ◽  
Andréa Luzia Ferreira de Souza ◽  
Renata Antoun Simão ◽  
Luiz Fernando Brum Malta
Keyword(s):  
Gold Nanoparticles ◽  
Atomic Force Microscopy ◽  
Layered Double Hydroxide ◽  
Xrd Analysis ◽  
Reducing Agents ◽  
Simple Approach ◽  
Force Microscopy ◽  
Atomic Force ◽  
Afm Analysis ◽  
Double Hydroxide

The present work introduces a new procedure to obtain gold nanoparticles (AuNPs). AuNPs (77–213 nm) were obtained in the absence of any classical reducing agents in a medium containing Mg2+/Al3+layered double hydroxide (LDH) andN,N-dimethylformamide. XRD analysis showed the presence of crystalline phases of gold in the Au/LDH composite. The 2θvalues of peaks corresponding to the LDH interlayer distance indicated that metallic NPs were deposited on the surface of the material. Furthermore, atomic force microscopy (AFM) analysis showed that AuNPs tend to agglomerate in a nonclassical halter-like shape.

ATOMIC FORCE MICROSCOPY AND XRD ANALYSIS OF SILVER FILMS DEPOSITED BY THERMAL EVAPORATION

2006 ◽  
Vol 20 (02) ◽  
pp. 217-231 ◽  
Author(s):  
MUHAMMAD MAQBOOL ◽  
TAHIRZEB KHAN
Keyword(s):  
Atomic Force Microscopy ◽  
Grain Size ◽  
Surface Characterization ◽  
Room Temperature ◽  
Thermal Evaporation ◽  
Xrd Analysis ◽  
Force Microscopy ◽  
Atomic Force ◽  
Average Grain Size ◽  
20 Nm

Thin films of pure silver were deposited on glass substrate by thermal evaporation process at room temperature. Surface characterization of the films was performed using X-ray diffraction (XRD) and atomic force microscopy (AFM). Thickness of the films varied between 20 nm and 72.8 nm. XRD analysis provided a sharp peak at 38.75° from silver. These results indicated that the films deposited on glass substrates at room temperature are crystalline. Three-dimension and top view pictures of the films were obtained by AFM to study the grain size and its dependency on various factors. Average grain size increased with the thickness of the deposited films. A minimum grain size of 8 nm was obtained for 20 nm thick films, reaching 41.9 nm when the film size reaches 60 nm. Grain size was calculated from the information provided by the XRD spectrum and averaging method. We could not find any sequential variation in the grain size with the growth rate.

Identification of Size Differences of Gold Nanoparticles on Cell Surface by Curvature Reconstruction Method Using Atomic Force Microscopy

2007 ◽  
Vol 46 (No. 8) ◽  
pp. L184-L186 ◽  
Author(s):  
Hyonchol Kim ◽  
Koudai Oikawa ◽  
Naoya Watanabe ◽  
Masatsugu Shigeno ◽  
Yoshiharu Shirakawabe ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Atomic Force Microscopy ◽  
Cell Surface ◽  
Reconstruction Method ◽  
Force Microscopy ◽  
Atomic Force

PLASMON ABSORPTION OF GOLD NANOPARTICLES AND THEIR MORPHOLOGIES OBSERVED BY AFM

1996 ◽  
Vol 03 (01) ◽  
pp. 1153-1156 ◽  
Author(s):  
H. ISHIKAWA ◽  
T. IDA ◽  
K. KIMURA
Keyword(s):  
Heat Treatment ◽  
Gold Nanoparticles ◽  
Atomic Force Microscopy ◽  
Absorption Spectrum ◽  
Color Change ◽  
Island Film ◽  
Plasmon Absorption ◽  
Force Microscopy ◽  
Atomic Force

We have studied the effect of heat treatment on Au-island film prepared by a sputtering method, atomic force microscopy (AFM), and UV-VIS spectrophotometry. The structure and absorption spectrum of Au-island film are significantly changed by heat treatment, which corresponds to the visible color change from blue to red. In order to elucidate the relation between the structural and optical changes, we have simulated the change of spectrum using the Maxwell-Garnett theory. The calculated spectra are qualitatively in agreement with the experimental spectra.

scholarly journals AFM ANALYSIS OF ENAMEL DAMAGE DUE TO ETCHING WITH ORTHOPHOSPHORIC ACID

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Vladan Mirjanić ◽  
Đorđe Mirjanić
Keyword(s):  
Atomic Force Microscopy ◽  
Orthophosphoric Acid ◽  
Tooth Enamel ◽  
Modern Technology ◽  
Single Plane ◽  
Force Microscopy ◽  
Atomic Force ◽  
Precise Analysis ◽  
Afm Analysis ◽  
Scientific Fields

Bearing in mind that in the field of jaw orthopedics and related scientific fields, there are no scientific studies that use the most modern technology based on the Atomic Force Microscopy (AFM) to investigate the nanostructure of tooth enamel after etching with 37% orthophosphoric acid, in this paper we will use this method, which is currently the most reliable, to determine the degree of tooth damage after its etching in the process of fixing orthodontic brackets. Considering the fact that the degree of enamel damage after etching cannot be realistically comprehended by the method called ’network’, because in this way the damage cannot be seen three dimensionally (the depth of the damage), but only the damage in a single plane, a more precise analysis can be obtained with the application of the most contemporary method that we can apply in this case, and that is the application of AFM technology.

scholarly journals Atomic Force Microscopy Nanomanipulation of Shape Persistent, Spherical, Self-Assembled Aggregates of Gold Nanoparticles

ACS Nano ◽  
2010 ◽  
Vol 4 (11) ◽  
pp. 6501-6508 ◽  
Author(s):  
Jeroen van Herrikhuyzen ◽  
Ron Willems ◽  
Subi J. George ◽  
Cees Flipse ◽  
Jeroen C. Gielen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Atomic Force Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Self Assembled
Sign in / Sign up

Export Citation Format

Share Document