Morphological and electrical characterization of conductive polylactic acid based nanocomposite before and after FDM 3D printing

2018 ◽  
Vol 136 (6) ◽  
pp. 47040 ◽  
Author(s):  
Razieh Hashemi Sanatgar ◽  
Aurélie Cayla ◽  
Christine Campagne ◽  
Vincent Nierstrasz
Keyword(s):  
3D Printing ◽  
Polylactic Acid ◽  
Electrical Characterization ◽  
Before And After

scholarly journals Electrical properties and microstructure fractal analysis of magnesium-modified aluminium-silicate ceramics

2011 ◽  
Vol 43 (2) ◽  
pp. 193-204 ◽  
Author(s):  
J. Purenovic ◽  
V.V. Mitic ◽  
Lj. Kocic ◽  
V.B. Pavlovic ◽  
V. Paunovic ◽  
...  
Keyword(s):  
Fractal Analysis ◽  
Sintering Temperature ◽  
Electrical Characterization ◽  
Porous Ceramics ◽  
Before And After ◽  
High Degree ◽  
Highly Porous ◽  
Aluminium Silicate

The addition of Mg2(NO)3 and some active additives, composed of Al salts, to the mixtures of kaolinite and bentonite can provide clay compositions which, after sintering at high temperatures, produce very porous ceramics with microcrystalline and amorphous regions and highly developed metalized surfaces (mainly with magnesium surplus). Characterization of sintered samples was done before and after treatment in ?synthetic water?, i.e. in aqueous solution of arsenic-salt. Microstructure investigations have revealed non-uniform and highly porous structure with broad distribution of grain size, specifically shaped grains and high degree of agglomeration. Electrical characterization was estimated by determining dielectric constant and electrical resistivity in function of active additives amount and sintering temperature. Fractal analysis has included determination of grain contour fractal dimension.

scholarly journals Characterization of Irradiated Boron, Carbon-Enriched and Gallium Si-on-Si Wafer Low Gain Avalanche Detectors

Instruments ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 2
Author(s):  
Lucía Castillo García ◽  
Evangelos Leonidas Gkougkousis ◽  
Chiara Grieco ◽  
Sebastian Grinstein
Keyword(s):  
Performance Studies ◽  
Hadron Collider ◽  
Electrical Characterization ◽  
Full Characterization ◽  
Silicon Sensors ◽  
Pile Up ◽  
Before And After ◽  
And Performance ◽  
Si Wafer

Low Gain Avalanche Detectors (LGADs) are n-on-p silicon sensors with an extra doped p-layer below the n-p junction which provides signal amplification. The moderate gain of these sensors, together with the relatively thin active region, provides excellent timing performance for Minimum Ionizing Particles (MIPs). To mitigate the effect of pile-up during the High-Luminosity Large Hadron Collider (HL-LHC) era, both ATLAS and CMS experiments will install new detectors, the High-Granularity Timing Detector (HGTD) and the End-Cap Timing Layer (ETL), that rely on the LGAD technology. A full characterization of LGAD sensors fabricated by Centro Nacional de Microelectrónica (CNM), before and after neutron irradiation up to 1015 neq/cm2, is presented. Sensors produced in 100 mm Si-on-Si wafers and doped with boron and gallium, and also enriched with carbon, are studied. The results include their electrical characterization (I-V, C-V), bias voltage stability and performance studies with the Transient Current Technique (TCT) and a Sr-90 radioactive source setup.

scholarly journals Characterization of a composite polylactic acid-hydroxyapatite 3D-printing filament for bone-regeneration

2020 ◽  
Vol 6 (2) ◽  
pp. 025007
Author(s):  
C Amnael Orozco-Díaz ◽  
Robert Moorehead ◽  
Gwendolen C Reilly ◽  
Fiona Gilchrist ◽  
Cheryl Miller
Keyword(s):  
3D Printing ◽  
Bone Regeneration ◽  
Polylactic Acid

Characterization of GeSi Layer Formed by High Dose Ge Implantation into Si

1993 ◽  
Vol 316 ◽  
Author(s):  
W.Y. Cheung ◽  
S.P. Wong ◽  
I.H. Wilson ◽  
T.H. Zhang
Keyword(s):  
Electrical Characterization ◽  
Esr Spectra ◽  
Alloy Layer ◽  
High Dose ◽  
Spreading Resistance ◽  
Before And After ◽  
G Value ◽  
P Type ◽  
Gesi Layer

ABSTRACTHigh dose Ge implantation into p-type <100> Si wafers at 150 keV has been performed at doses of 3.6×1016, 6.7×1016 and 9.0×1016 cm-2. The Ge distribution and the crystal quality of the implanted layer before and after annealing at various temperatures have been studied by RBS and channelling experiments. It is found that for the medium and high dose samples before annealing, more than 90% of the Ge atoms are in interstitial sites and after annealing at 1000°C, more than 50% of the Ge atoms have become substitutional. The situation is better for the low dose sample where less than 70% of the Ge atoms are in interstitial sites before annealing and about 80% of them become substitutional after annealing at 1000°C. The ESR spectra of these samples are of lorentzian shape with a g-value of about 2.007 and a spin density of about 6×1016 cm-3. The ESR signals of these samples have been inferred to be mainly due to Si-dangling bonds in the GeSi alloy layer and can be eliminated by annealing at 1000°C for 10 minutes. Electrical characterization of the GeSi layer by spreading resistance profiling technique shows that the implantation damage has been extended deep into the substrate before annealing. After annealing at 1000°C, these defects are removed but the spreading resistance of the surface GeSi layer is found to remain higher than that of the substrate.

Electrical Characterization of Commercial Power MOSFET Under Electron Radiation

2017 ◽  
Vol 8 (2) ◽  
pp. 462
Author(s):  
Wan Nurhasana binti Wan Ayub ◽  
Nurul Fadzlin Hasbullah ◽  
Abdul Wafi Rashid
Keyword(s):  
Dose Level ◽  
Electron Irradiation ◽  
Threshold Voltage ◽  
Electrical Characterization ◽  
Electron Radiation ◽  
Power Mosfet ◽  
Before And After ◽  
Radiation Induced ◽  
Oxide Traps

<p>This paper presents the threshold voltage shifts for both p-channel and n-channel commercial power MOSFET before and after electron irradiation. The experiment was done under the 3MeV energy of electron with dose level varies from 50KGy until 250KGy. The results were plotted and analyzed in terms of the shifted voltage characteristics. It is observed that after irradiation, both p-channel and n-channel MOSFET experiences negative threshold voltage shifts. For n-channel devices, this is due to the radiation-induced positive charges dominated in the oxide traps while for p-channel devices it is believed due to radiation-induced ionization damage.</p>

Characterization of 3d printing filaments applied in restoration of sensitive archaeological objects using rapid prototyping

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Elvira Aura-Castro ◽  
Carmen Díaz-Marín ◽  
Xavier Mas-Barberà ◽  
Miguel Sánchez ◽  
Eduardo Vendrell Vidal
Keyword(s):  
3D Printing ◽  
Rapid Prototyping ◽  
Polylactic Acid ◽  
Fused Deposition Modeling ◽  
Polymeric Materials ◽  
Acrylonitrile Butadiene Styrene ◽  
Content Type ◽  
Fused Deposition ◽  
Archaeological Objects

Purpose The purpose of this paper is to characterize three-dimensional (3D) printing filaments commonly used in fused deposition modeling (FDM) to determine their viability for restoration and conservation treatments. Design/methodology/approach Eight current filaments for FDM from six polymeric materials have been characterized to determine their suitability for restoration and conservation treatments. For testing these filaments, specimens are printed with acrylonitrile-butadiene-styrene; polylactic acid; polylactic acid with CaCO3 (E.P.); polyethylene terephthalate glycol; polypropylene; and high-impact polystyrene. Suitability of a filament was verified using the Oddy test by detecting the action of volatile pollutants released from the filaments. The morphological and color changes were observed after allowing them to degrade under the exposure of UV radiation. The samples were then analyzed using Fourier-transform infrared spectroscopy. In addition, gas chromatography-mass spectroscopy technique was applied to complete the characterization of the printed filaments. Findings Materials investigated are suitable for restoration purposes ensuring long-term stability. Rapid prototyping using FDM is appropriate for restoring sensitive archaeological objects allowing reconstruction of parts and decreasing risk while manipulating delicate artifacts. Originality/value Rapid prototyping using FDM was chosen for the restoration of a fragile and sensitive archaeological glass bowl from Manises Ceramic Museum.

scholarly journals The use of statistical techniques to study the machine parameters affecting the properties of 3D printed cotton/polylactic acid fabrics

2020 ◽  
Vol 15 ◽  
pp. 155892502092853
Author(s):  
Nonsikelelo Sheron Mpofu ◽  
Josphat Igadwa Mwasiagi ◽  
Londiwe Cynthia Nkiwane ◽  
David Njuguna Githinji
Keyword(s):  
Tensile Strength ◽  
3D Printing ◽  
Polylactic Acid ◽  
Adhesion Force ◽  
Extrusion Temperature ◽  
Coefficient Of Determination ◽  
Fused Deposition Modelling ◽  
Fused Deposition ◽  
Before And After ◽  
Printing Speed

Textile materials have been combined with polymers using 3D printing technology, thus producing structures with novel properties. The aim of this study was to use statistical methods to determine the effect of 3D printing machine parameters on the mechanical properties of cotton fabrics combined with polylactic acid. Polylactic acid was printed on a cotton fabric using an Athena Fused Deposition Modelling 3D printer. The effect of extrusion temperature, printing speed, fill density and model height on adhesion force before and after washing was investigated. A study of the tensile strength was also undertaken using a central composite rotatable design and regression analysis. The experimental data were used to develop regression models to predict the properties of the cotton/ polylactic acid structures. The model for adhesion force before washing yielded a coefficient of determination (R2) value of 0.75 and an optimum adhesion force of 50.06 N/cm. The model for adhesion force had an R2 value of 0.84 and an optimum adhesion force of 42.91 N/cm and showed that adhesion force reduced after washing. Adhesion forces before and after washing were both positively correlated to extrusion temperature. However, they reduced with an increase in printing speed and model height. A positive correlation exists between tensile strength and temperature, while a negative correlation exists between tensile strength and printing speed and model height. From the results of this study, it was concluded that 3D printing parameters have an effect on the properties of the structures.

scholarly journals Fabrication and Electrical Characterization of Multiwalled Carbon Nanotube-Based Circuit at Room Temperature

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Yitian Peng ◽  
Yuanzhong Hu ◽  
Weibing Lu
Keyword(s):  
Carbon Nanotube ◽  
Electrical Properties ◽  
Electrical Characterization ◽  
Multiwalled Carbon Nanotube ◽  
Self Assembled Monolayers ◽  
Metal Electrodes ◽  
Multiwalled Carbon ◽  
Before And After ◽  
Assembled Monolayers

Multiwalled carbon nanotube (MWCNT) deposited on a pair of predetermined aluminum electrodes treated with the (3-Aminopropyl)-triethoxysilane (APTES) self-assembled monolayers (SAMs). The MWCNT bridges electrodes and forms electrode/MWCNT/electrode circuit on silicon with 500 nm silicon dioxide. Then the Metal (Ti/Au) pads were fabricated on MWCNT to bury the MWCNT into metal electrodes. The electrical properties of MWCNT-based circuits before and after the fabrication of metal pads were characterized. Results indicate that metal pads on MWCNT improved the electrical properties MWCNT-based circuit largely.

Sign in / Sign up

Export Citation Format

Share Document