scholarly journals Combination of atomic force microscopy and principal component analysis as a general method for direct recognition of functional and structural domains in nanonocomposite materials

2010 ◽  
pp. NA-NA ◽  
Author(s):  
Bruno Torre ◽  
Manuele Bicego ◽  
Marco Cristiani ◽  
Vittorio Murino ◽  
Alberto Diaspro ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Atomic Force Microscopy ◽  
Principal Component ◽  
Component Analysis ◽  
Structural Domains ◽  
Force Microscopy ◽  
Atomic Force ◽  
Direct Recognition ◽  
General Method

Label-free detection of biotoxins via a photo-induced force infrared spectrum at the single-molecular level

The Analyst ◽  
2019 ◽  
Vol 144 (20) ◽  
pp. 6108-6117 ◽  
Author(s):  
Bin Ji ◽  
Ahmad Kenaan ◽  
Shan Gao ◽  
Jin Cheng ◽  
Daxiang Cui ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Infrared Spectrum ◽  
Single Molecule ◽  
Molecular Level ◽  
Principal Component ◽  
Component Analysis ◽  
Label Free ◽  
Force Microscopy ◽  
Label Free Detection

Schematic illustration of photo-induced force microscopy combine principal component analysis detected and distinguish single molecule particles of biotoxins AT, RT/ETX with label-free.

Measuring graphene adhesion using atomic force microscopy with a microsphere tip

Nanoscale ◽  
2015 ◽  
Vol 7 (24) ◽  
pp. 10760-10766 ◽  
Author(s):  
Tao Jiang ◽  
Yong Zhu
Keyword(s):  
Atomic Force Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
General Method

This work reports a general method to measure adhesion energies between graphene and different materials using atomic force microscopy with microsphere tips.

Review: Deformation and Adhesion of Viscoelastic Particles: Theory and Experiment

2001 ◽  
Vol 54 (8) ◽  
pp. 477 ◽  
Author(s):  
Phil Attard ◽  
Graeme Gillies
Keyword(s):  
Atomic Force Microscopy ◽  
Force Measurements ◽  
Force Microscopy ◽  
Load Dependence ◽  
Viscoelastic Parameters ◽  
Atomic Force ◽  
Extended Range ◽  
Deformable Bodies ◽  
Viscoelastic Theory ◽  
General Method

A summary is given of the authors’ recent research on viscoelastic theory and its application to colloid probe atomic force microscopy. A general computational approach for the interaction of viscoelastic colloids interacting with realistic surface forces of extended range is outlined, and the origins of velocity- and time-dependent effects including hysteresis are discussed. A general method for establishing the zero of separation in atomic force microscopy of deformable bodies is described and utilized in force measurements made on viscoelastic poly(dimethylsiloxane) colloid particles. A quantitative analysis of the velocity and load dependence of the hysteresis in the measurements yields the viscoelastic parameters of the colloid.

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽  
2012 ◽  
Vol 41 (5) ◽  
pp. 333-342 ◽  
Author(s):  
Kirchberger ◽  
Finger ◽  
Müller-Bühl
Keyword(s):  
Principal Component Analysis ◽  
Intermittent Claudication ◽  
Completion Time ◽  
Short Form ◽  
Principal Component ◽  
Component Analysis ◽  
German Version ◽  
Average Completion Time ◽  
Sf 36 ◽  
Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbach’s alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbach’s alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

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