Room Temperature Single-Spin Tunneling Force Microscopy for Characterization of Paramagnetic Defects in Electronic Materials

2014 ◽  
Author(s):  
Clayton Williams ◽  
Christoph Boehme
Keyword(s):  
Room Temperature ◽  
Electronic Materials ◽  
Force Microscopy ◽  
Single Spin ◽  
Spin Tunneling

Electrical Characterization of Al Implanted 4H-SiC Layers by Four Point Probe and Scanning Capacitance Microscopy

2009 ◽  
Vol 615-617 ◽  
pp. 457-460 ◽  
Author(s):  
Filippo Giannazzo ◽  
Martin Rambach ◽  
Dario Salinas ◽  
Fabrizio Roccaforte ◽  
Vito Raineri
Keyword(s):  
Room Temperature ◽  
Annealing Temperature ◽  
Electrical Characterization ◽  
Electrical Activation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Activation Data ◽  
Accurate Comparison ◽  
Spike Anneal

We studied the evolution of the electrical activation with annealing temperature and time in 4H-SiC implanted with Al ions at room temperature (RT). An accurate comparison between the electrical activation data obtained by FPP and SCM was carried out. The dependence of the electrically active profiles on annealing time was studied during isothermal (Tann=1600 °C) annealings for times ranging from 0 (spike anneal) to 30 min. By performing isochronal (t=30 min) processes at temperatures from 1550 to 1650 °C, the effect of the annealing temperature on the net doping concentration profiles was studied. Moreover, the activation energy (6.30.3 eV) associated to the process was extracted from the Arrhenius plot of the net active dose. Finally, the effect of the different thermal budgets on the roughening of the Al implanted 4H-SiC surface was also investigated in details by atomic force microscopy.

Synthesis and Characterization of Supported Bioactive Lipid Membranes

1997 ◽  
Vol 489 ◽  
Author(s):  
Theodore M. Winger ◽  
Elliot L. Chaikof
Keyword(s):  
Lipid Membranes ◽  
Room Temperature ◽  
Synthesis And Characterization ◽  
Peptide Conjugates ◽  
Force Microscopy ◽  
Atomic Force ◽  
Membrane Mimetic ◽  
Phosphate Buffered Saline ◽  
Mixed Systems

AbstractSingle and multicomponent membrane-mimetic surfaces of DPPC and synthetic lipid-peptide conjugates were formed on an alkylated glass surface by a process of vesicle fusion. Correlative atomic force microscopy and radiochemical titration techniques confirmed the generation of a single substrate supported monolayer and predictable deposition of defined concentrations of lipopeptide. Mixed systems were stable for periods exceeding 1 month if stored at room temperature in phosphate buffered saline.

scholarly journals Synthesis and Characterization of a Monoclinic Crystalline Phase of Hydroxyapatite by Synchrotron X-ray Powder Diffraction and Piezoresponse Force Microscopy

Crystals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 458 ◽  
Author(s):  
Ricardo Pérez-Solis ◽  
José Gervacio-Arciniega ◽  
Boby Joseph ◽  
María Mendoza ◽  
Abel Moreno
Keyword(s):  
Room Temperature ◽  
Monoclinic Phase ◽  
Sol Gel ◽  
Ultrasound Irradiation ◽  
Piezoresponse Force Microscopy ◽  
Medical Rehabilitation ◽  
X Ray ◽  
Force Microscopy ◽  
Piezoelectric Force Microscopy

In this work, we report the synthesis of a monoclinic hydroxyapatite [Ca10(PO4)6(OH)2] (hereafter called HA) prepared by the sol-gel method assisted by ultrasound radiation at room temperature. The characterization of both the monoclinic and the hexagonal phases were performed by powder X-ray diffraction (PXRD) and using synchrotron radiation (SR). The measurement of the piezoelectricity was performed by piezoresponse force microscopy (PFM). The synthesis produced a mixture of monoclinic and hexagonal hydroxyapatite (HA). We also discuss the importance of stabilizing the monoclinic phase at room temperature with ultrasound irradiation. The existence of the monoclinic phase has important advantages in terms of showing piezoelectric properties for applications in the new medical rehabilitation therapies. Rietveld refinement of the PXRD data from SR indicated the monoclinic phase to be of about 81%. Finally, piezoelectric force microscopy was used to distinguish the phases of hydroxyapatite by measuring the average piezoelectric coefficient deff = 10.8 pm/V.

scholarly journals Biosynthesis and Characterization of Silver Nanoparticles From Pantoea agglomerans and Some of Their Antibacterial Activities

2020 ◽  
Vol 31 (3) ◽  
pp. 1
Author(s):  
Layla Abdul-Hamid Said
Keyword(s):  
Escherichia Coli ◽  
Silver Nanoparticles ◽  
Room Temperature ◽  
Antibacterial Activities ◽  
Multidrug Resistant ◽  
Pantoea Agglomerans ◽  
Force Microscopy ◽  
Atomic Force ◽  
And Staphylococcus Aureus

Recently, the biosynthesis of nanoparticles from bacteria have attracted attention, this study has been made for biosynthesize and characterizes silver nanoparticles (AgNPs) from local clinical isolate Pantoea agglomerans. The ability of those particles to inhibit the virulence factors biofilm and hemolysin produced by some local clinical multidrug-resistant human pathogenes including Acinetobactor haemolyticus, Escherichia coli, Serratia marcescens and Staphylococcus aureus were investigated by treating all of the test isolates with sub-MIC(16 mg/ml) AgNPs. The AgNPs produced were characterized using Atomic Force Microscopy (AFM). Pantoea agglomerans were found to have the ability to synthesize AgNPs at room temperature within 24hrs and were spherical in shape as depicted by AFM. The AgNPs produced exhibited a potential antibiofilm and hemolysin inhibition activities against tested pathogens.

AFM, HR-XRD AND PL CHARACTERIZATION OF STACKED STRUCTURES In0.5Ga0.5As/GaAs QUANTUM DOTS

NANO ◽  
2010 ◽  
Vol 05 (02) ◽  
pp. 127-132 ◽  
Author(s):  
DIDIK ARYANTO ◽  
ZULKAFLI OTHAMAN ◽  
AMIRA S. AMERUDDIN ◽  
ABD. KHAMIM ISMAIL
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Size Composition ◽  
X Ray Diffraction ◽  
Satellite Peak ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Vertically Aligned

In0.5Ga0.5As quantum dots (QDs) stacked structure were studied using atomic force microscopy (AFM), high-resolution X-ray diffraction (HR-XRD) and photoluminescence (PL) characterization. Evolution in the dots size and dots density in the stacked structures is strongly influenced by the dot formation in the under-layer and the structure of the spacer layers. AFM results revealed that the dots formation on the top can be changed by increasing the number of stacked QDs. However, the dots formation is not vertically aligned since HR-XRD measurement gave different satellite peak on n-stacked QD structures. Room-temperature PL measurements show variation in the PL spectra, where blue-shifted PL peak positions are observed when the number of stack is increased. Variation in the HR-XRD and PL measurement is also attributed to the size, composition and density of the dots in the stacked structures.

scholarly journals Characterization of room-temperature in-plane magnetization in thin flakes of CrTe2 with a single-spin magnetometer

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
F. Fabre ◽  
A. Finco ◽  
A. Purbawati ◽  
A. Hadj-Azzem ◽  
N. Rougemaille ◽  
...  
Keyword(s):  
Room Temperature ◽  
Single Spin
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