scholarly journals Tuning Fork Scanning Probe Microscopes - Applications for the Nano-Analysis of the Material Surface and Local Physico-Mechanical Properties

10.5772/36187 ◽  
2012 ◽  
Author(s):  
Vo Thanh ◽  
S.A. Chizhik ◽  
Tran Xuan ◽  
Nguyen Trong ◽  
V.V. Chikunov
Keyword(s):  
Mechanical Properties ◽  
Tuning Fork ◽  
Scanning Probe ◽  
Material Surface

A Dynamic Model of Two-Beam Tuning Fork

2008 ◽  
Vol 381-382 ◽  
pp. 337-340
Author(s):  
Zhao Gang Dong ◽  
Ying Zhang ◽  
Y.C. Soh
Keyword(s):  
Mechanical Properties ◽  
Theoretical Model ◽  
Dynamic Model ◽  
Shear Force ◽  
Tuning Fork ◽  
Piezoelectric Properties ◽  
Scanning Probe ◽  
Theoretical Studies ◽  
Force Detection ◽  
Mechanical Coupling

The shear force detection by using a tuning fork plays a key role in the implement all kinds of scanning probe microscopes. This paper presents primary results of modeling dynamics of a tuning fork. The obtained model considers not only the piezoelectric properties and mechanical properties of the tuning fork, but also the electric-mechanical coupling between the two prongs of the tuning fork. It has been shown by theoretical studies and experiment results that the theoretical model can fit the amplitude and phase responses of a tuning fork.

Sample stage designed for force modulation microscopy using a tip-mounted AFM scanner

The Analyst ◽  
2016 ◽  
Vol 141 (5) ◽  
pp. 1753-1760 ◽  
Author(s):  
Lu Lu ◽  
Song Xu ◽  
Donghui Zhang ◽  
Jayne C. Garno
Keyword(s):  
Mechanical Properties ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Probe Microscopy ◽  
Force Modulation ◽  
Topographic Information

Among the modes of scanning probe microscopy (SPM), force modulation microscopy (FMM) is often used to acquire mechanical properties of samples concurrent with topographic information.

Application of Microbial Polyesters-Polyhydroxyalkanoates as Tissue Engineering Materials

2005 ◽  
Vol 288-289 ◽  
pp. 437-440 ◽  
Author(s):  
Guo Qiang Chen ◽  
Qiong Wu ◽  
Ya Wu Wang ◽  
Zhong Zheng
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Surface Treatment ◽  
Surface Properties ◽  
Three Dimensional ◽  
Material Surface ◽  
New Class ◽  
Molecular Studies ◽  
Cartilage Cells ◽  
Engineering Materials

Poly(hydroxybutyrate-co-hydroxyhexanoate) (PHBHHx) has improved mechanical properties over the existing PHA and our results have shown that PHBHHx has better biocompatibility over polyhydroxybutyrate (PHB) and polylactic acid (PLA). Surface treatment with lipases dramatically changed the material surface properties and increased the biocompatibility of the PHBHHx. PHBHHx and its PHB blends had been used to make three dimensional structures and it has been found that cartilage, osteoblast, and fibroblasts all showed strong growth on the PHBHHx scaffolds. The growth was much better compared with PLA. The molecular studies also showed that mRNA encoding cartilages were strongly expressed when cartilage cells were grown on the PHBHHx. As PHBHHx has strong mechanical properties, easily processible and biodegradable, this material can be used to develop a new class of tissue engineering materials.

scholarly journals Influence of HIP Treatment on Mechanical Properties of Ti6Al4V Scaffolds Prepared by L-PBF Process

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1267 ◽  
Author(s):  
Lili Liu ◽  
Huade Zheng ◽  
Chunlin Deng
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Oxide Layer ◽  
Critical Stress ◽  
Porous Scaffold ◽  
Optical Microscope ◽  
Post Treatment ◽  
Material Surface ◽  
Porous Scaffolds ◽  
Pressure Test

To improve biocompatibility and mechanical compatibility, post-treatment is necessary for porous scaffolds of bone tissue engineering. Hot isostatic pressing (HIP) is introduced into post-treatment of metal implants to enhance their mechanical properties by eliminating residual stress and pores. Additionally, oxide film formed on the material surface can be contributed to improve its biocompatibility. Ti6Al4V porous scaffolds fabricated by laser-powder bed fusion (L-PBF) process is studied in this paper, their mechanical properties are measured by pressure test, and the macroscopic surface morphology and microstructure are observed by optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). After HIP treatment, an oxide layer of 0.8 μm thickness forms on the surface of Ti6Al4V porous scaffolds and the microstructure of Ti6Al4V transforms from α’ phase to α + β dual-phase, as expected. However, the pressure test results of Ti6Al4V porous scaffolds show a definitely different variation trend of mechanical properties from solid parts, unexpectedly. Concerning Ti6Al4V porous scaffolds, the compression stiffness and critical stress improves clearly using HIP treatment, and the fracture morphology shows obvious brittle fracture. Both the strengthening and brittleness transition of Ti6Al4V porous scaffolds result from the formation of an oxide layer and an oxygen atom diffusion layer. The critical stress of Ti6Al4V porous scaffolds can be calculated by fully considering these two strengthening layers. To obtain a porous scaffold with specific mechanical properties, the effect of post-treatment should be considered during structural design.

scholarly journals Kekerasan Baja Karbon Sedang dengan Variasi Suhu Permukaan Material

Jurnal METTEK ◽  
2018 ◽  
Vol 4 (2) ◽  
pp. 43
Author(s):  
Dwi Payana ◽  
I Made Widiyarta ◽  
Made Sucipta
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Contact Surface ◽  
Room Temperature ◽  
Failure Mechanisms ◽  
Material Surface ◽  
Temperature Variations ◽  
Vickers Indent ◽  
Steel Material ◽  
Hardness Tests

Beban gesek pada permukaan sebuah benda dapat menimbulkan panas pada permukaan kontak benda tersebut. Semakin besar beban gesek yang terjadi, suhu pada permukaan material akan menjadi lebih tinggi. Peningkatan suhu permukaan yang semakin tinggi dapat mempengaruhi sifat mekanis permukaan material dan tentunya dapat berimplikasi terhadap mekanisme kegagalan pada permukaan material tersebut, seperti kegagalan aus dan kegagalan retak. Pada penelitian ini, uji kekerasan dilakukan pada material dengan suhu permukaan tertentu. Permukaan material baja karbon sedang dipanaskan dengan variasi suhu yaitu mulai dari suhu kamar sampai dengan 300ºC, kemudian dilakukan uji Vicker’s. Tingkat kekerasan dan profil indentasi Vickers pada permukaan material dengan variasi suhu tersebut kemudian diinvestigasi. Friction load on the surface of an object can cause heat on the contact surface of the object. The larger the frictional load occurs, the temperature on the surface of the material will become higher. Increased surface temperatures can further affect the mechanical properties of the material surface and can certainly have implications for the failure mechanisms on the surface of the material, such as wear failure and crack failure. In this study, hardness tests were performed on materials with certain surface temperature. The surface of the carbon steel material is being heated with temperature variations ranging from room temperature up to 300ºC, then Vicker's test. The degree of hardness and Vickers indent profile on the surface of the material with the temperature variation is then investigated.

scholarly journals Development of a novel nanoindentation technique by utilizing a dual-probe AFM system

2015 ◽  
Vol 6 ◽  
pp. 2015-2027 ◽  
Author(s):  
Eyup Cinar ◽  
Ferat Sahin ◽  
Dalia Yablon
Keyword(s):  
Scanning Probe Microscopy ◽  
Tuning Fork ◽  
Vertical Movement ◽  
Fused Silica ◽  
Scanning Probe ◽  
Depth Sensing ◽  
New Approach ◽  
Probe System ◽  
Properties Of Materials ◽  
Dual Probe

A novel instrumentation approach to nanoindentation is described that exhibits improved resolution and depth sensing. The approach is based on a multi-probe scanning probe microscopy (SPM) tool that utilizes tuning-fork based probes for both indentation and depth sensing. Unlike nanoindentation experiments performed with conventional AFM systems using beam-bounce technology, this technique incorporates a second probe system with an ultra-high resolution for depth sensing. The additional second probe measures only the vertical movement of the straight indenter attached to a tuning-fork probe with a high spring constant and it can also be used for AFM scanning to obtain an accurate profiling. Nanoindentation results are demonstrated on silicon, fused silica, and Corning Eagle Glass. The results show that this new approach is viable in terms of accurately characterizing mechanical properties of materials through nanoindentation with high accuracy, and it opens doors to many other exciting applications in the field of nanomechanical characterization.

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