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Online since: September 2012
Authors: Markus Windisch, Thomas Junghans
Hydrogel Sensors for Process Monitoring
Markus Windisch1,a ∗, Thomas Junghans2,b
1Institute of Electromechanical and Electronic Design, Dresden University of Technology, D-01062
Dresden, Germany
2Department of Chemistry, Physical Chemistry of Polymers, Dresden University of Technology,
D-01062 Dresden, Germany
amarkus.windisch@tu-dresden.de, bthomas.junghans@chemie.tu-dresden.de,
∗corresponding author
Keywords: hydrogel sensor, thickness shear resonator, chemical concentration, optimized design,
manufacturing technology, portable measuring device
Abstract.
It is based on optimizing the interrelation of the sensor structure, the manufacturing technology for the hydrogel layer, and the processing of the measured data.
Therefore a phenomenological approach was chosen for the optimization of the Fig. 2: Optimized Design of the Sensor Head sensor structure and the processing of the measured data.
In addition to the coating the sensor structure also influences the spectra.
It is based on optimizing the interrelation of the sensor structure, the manufacturing technology for the hydrogel layer, and the processing of the measured data.
Therefore a phenomenological approach was chosen for the optimization of the Fig. 2: Optimized Design of the Sensor Head sensor structure and the processing of the measured data.
In addition to the coating the sensor structure also influences the spectra.
Online since: April 2021
Authors: Riesma Tasomara, Nendar Herdianto, Dwi Gustiono, Adita Wardani Rahmania, Hanan Hakim, Lukmana Lukmana
The mesoporous structure of bone graft material is suitable for drug delivery purpose.
Morphological analysis using Scanning Electron Microscope (SEM) observed the presence of regular porous structure, however, the mesoporous structure was not seen.
Mesoporous structure of bone graft material is the promising candidate for drug delivery application since the structure provides pore size that is suitable for hosting drugs and cellular substances.
The International Physical and Applied Chemistry (IUPAC) has classified the standard definition of pore size which are micropores (< 2 nm), mesopores (2 - 50 nm), and macropores (> 50 nm) [3].
The presence of porous structure of BCP-K were confirmed by BCP-K SEM micrograph.
Morphological analysis using Scanning Electron Microscope (SEM) observed the presence of regular porous structure, however, the mesoporous structure was not seen.
Mesoporous structure of bone graft material is the promising candidate for drug delivery application since the structure provides pore size that is suitable for hosting drugs and cellular substances.
The International Physical and Applied Chemistry (IUPAC) has classified the standard definition of pore size which are micropores (< 2 nm), mesopores (2 - 50 nm), and macropores (> 50 nm) [3].
The presence of porous structure of BCP-K were confirmed by BCP-K SEM micrograph.
Online since: May 2021
Authors: Siti Amira Othman, Nur Nadia Nasir
PVA has an atactic chain structure and the size of the OH group of PVA is small, allowing it to fit into the crystal lattice.
The measurement of viscosity is one of important factor to detect changes in polymer which is in structure and molecular weight [43].
It also found that, radiation led to formation of intact network structure [9].
Gadekar, Starch Based Bio-Plastics: The Future of Sustainable Packaging, Open Journal of Polymer Chemistry 8 (2018) 21-33
Bressler, Progress in bio-based plastics and plasticizing modifications, Journal of Materials Chemistry A.
The measurement of viscosity is one of important factor to detect changes in polymer which is in structure and molecular weight [43].
It also found that, radiation led to formation of intact network structure [9].
Gadekar, Starch Based Bio-Plastics: The Future of Sustainable Packaging, Open Journal of Polymer Chemistry 8 (2018) 21-33
Bressler, Progress in bio-based plastics and plasticizing modifications, Journal of Materials Chemistry A.
Online since: May 2020
Authors: Neil John Coville, Iakovos Sigalas, Andrew M. Hank, Hu Li, Bridget Mutuma, Klaus Leifer, Cuthbert Nyamupangedengu
Graphene, graphite and carbon nanotubes usually have extended interacting structures due to their van der Waals forces, and are known to comprise crystalline sp2 hybridised carbons that make them conductive [15].
At the correct concentration and high shear mixing the different ‘necklace like structures’ of CSs can be broken up and/or well dispersed in the host matrix such as an epoxy resin.
The D band is characteristic of the breathing mode of sp3 carbon atoms and defects in the carbon sp2 structure.
Amouroux, ‘Reactor design and energy concepts for a plasma process of acetylene black production’, Plasma Chemistry and Plasma Processing, vol. 6, no. 4, pp. 335–348, Dec. 1986
Effect on the surface chemistry, porosity and electrical conductivity’, Journal of Analytical and Applied Pyrolysis, vol. 67, no. 1, pp. 55–76, Mar. 2003
At the correct concentration and high shear mixing the different ‘necklace like structures’ of CSs can be broken up and/or well dispersed in the host matrix such as an epoxy resin.
The D band is characteristic of the breathing mode of sp3 carbon atoms and defects in the carbon sp2 structure.
Amouroux, ‘Reactor design and energy concepts for a plasma process of acetylene black production’, Plasma Chemistry and Plasma Processing, vol. 6, no. 4, pp. 335–348, Dec. 1986
Effect on the surface chemistry, porosity and electrical conductivity’, Journal of Analytical and Applied Pyrolysis, vol. 67, no. 1, pp. 55–76, Mar. 2003
Online since: October 2018
Authors: Ahmed Ismail Zaky Farahat, Taha Mattar, Mohamed Kamal El-Fawkhry, Ayman M. Fathy
Effect of Chemistry Modification, Hot Forging and Partitioning on Low Alloy Grade Tool Steel
Ahmed I.
Development of S6 tool steel has been discussed in this research by conducting a bit modification in the chemical composition using aluminum instead of molybdenum, and micro addition of boron to enhance the marteniste structure.
Referring to the chemical composition of S6 tool steel, martensite and carbides are the main structure formed after heat treatment process.
This structure exhibits a good wear resistance character at the expense of ductility.
Microadditions of vanadium and boron have been added to refine the parent austenite, and martensitic structure, respectively.
Development of S6 tool steel has been discussed in this research by conducting a bit modification in the chemical composition using aluminum instead of molybdenum, and micro addition of boron to enhance the marteniste structure.
Referring to the chemical composition of S6 tool steel, martensite and carbides are the main structure formed after heat treatment process.
This structure exhibits a good wear resistance character at the expense of ductility.
Microadditions of vanadium and boron have been added to refine the parent austenite, and martensitic structure, respectively.
Online since: July 2012
Authors: Xiao Jing Wang, Yu Ze Xie, Yu Lu Liu
Effects of Zinc Cations Doping and the Photo-Absorbed Mechanism for NaTaO3 Nanoparticles
Yuze Xie, Yulu Liu and Xiaojing Wanga
School of Chemistry and Chemical Engineering, Inner Mongolia University, Huhehaote City 010021, P.
Effects of zinc cations doping into wide band gap semiconductor photocatalysts of electronic structure, visible light response, and photo-absorbed mechanism were studied.
The band structure calculation was done using Material Stadio Castep package (Accelrys).
(d) HRTEM images of 0.50Zn-doped NaTaO3 Fig.4 Diffuse reflenctance spectrum of NaTaO3 doped with zinc of different ratio Fig.5 Supercell model of NaTa0.875Cu0.125O3 Fig.6 Band structure of NaTaO3 Fig.7 Band structure of NaTa0.875Cu0.125O3 Fig.8 DOS and PDOS of NaTaO3 and Zn- NaTaO3 The band structure and density of states are calculated using CASTEP code for the 2×2×1 super cell (40 atoms).
Thus the doping of zinc ions does not influence the energy band structure, being consistent with those estimated from the UV-vis reflectance spectra.
Effects of zinc cations doping into wide band gap semiconductor photocatalysts of electronic structure, visible light response, and photo-absorbed mechanism were studied.
The band structure calculation was done using Material Stadio Castep package (Accelrys).
(d) HRTEM images of 0.50Zn-doped NaTaO3 Fig.4 Diffuse reflenctance spectrum of NaTaO3 doped with zinc of different ratio Fig.5 Supercell model of NaTa0.875Cu0.125O3 Fig.6 Band structure of NaTaO3 Fig.7 Band structure of NaTa0.875Cu0.125O3 Fig.8 DOS and PDOS of NaTaO3 and Zn- NaTaO3 The band structure and density of states are calculated using CASTEP code for the 2×2×1 super cell (40 atoms).
Thus the doping of zinc ions does not influence the energy band structure, being consistent with those estimated from the UV-vis reflectance spectra.
Online since: February 2010
Authors: Karthikeyan Subramani
In a study using 3aminopropyltriethoxysilane
(APTES) chemistry, RGD sequence was bound to Ti-6Al-4V
surface [43].
Silanization using APTES chemistry has also been utilized in covalent attachment of RGD peptide on hydroxyapatite coated titanium substrates.
Meirelles et al.: Nano hydroxyapatite structures influence early bone formation.
Kay: Calcium phosphate coatings: understanding the chemistry and biology and their effective use.
Structures and compositions of the anodic films Electrochimica Acta 1988;33(11):1539-1549
Silanization using APTES chemistry has also been utilized in covalent attachment of RGD peptide on hydroxyapatite coated titanium substrates.
Meirelles et al.: Nano hydroxyapatite structures influence early bone formation.
Kay: Calcium phosphate coatings: understanding the chemistry and biology and their effective use.
Structures and compositions of the anodic films Electrochimica Acta 1988;33(11):1539-1549
Online since: November 2011
Authors: Vittorio Elia, Elena Napoli
Nanostructures of Water Molecules in Iteratively Filtered Water
Vittorio Elia1,a, Elena Napoli2,a
1 Department of Chemistry, University “Federico II” of Naples, Complesso Universitario di Monte S’Angelo, Via Cintia, 80126 Naples, Italy
Keywords: pure water, conductometry, dissipative structures, aqueous nanostructures, filtration, LECS - Low Energy Coherent Systems.
The energy flux is partially dissipated as heat permitting the formation of “dissipative structures”.
The energy flux is partially dissipated as heat enabling the formation of “dissipative structures” [17,18].
Such structures consequently lead to an increase of c (mS cm-1).
Prigogine: Time, structure and fluctuations; Nobel Lecture, 8 December (1977) [18] G.
The energy flux is partially dissipated as heat permitting the formation of “dissipative structures”.
The energy flux is partially dissipated as heat enabling the formation of “dissipative structures” [17,18].
Such structures consequently lead to an increase of c (mS cm-1).
Prigogine: Time, structure and fluctuations; Nobel Lecture, 8 December (1977) [18] G.
Online since: August 2018
Authors: Marvin U. Herrera, Gian Paul Joshua De Vera Arejola
This structure is called an Iminium bond.
Molecular structures of PANI Emeraldine base and salt.
Its molecular structure is shown in Fig. 2.
Molecular structure of polyethylene (PE).
Preparation of a conducting polymer (IUPAC technical report), Pure and Applied Chemistry. 74(5) (2002) 857-867
Molecular structures of PANI Emeraldine base and salt.
Its molecular structure is shown in Fig. 2.
Molecular structure of polyethylene (PE).
Preparation of a conducting polymer (IUPAC technical report), Pure and Applied Chemistry. 74(5) (2002) 857-867
Online since: June 2023
Authors: Peng Yu Zhang, Zhi Yi Mao, Dong Mei Wang, Qian Sun, Yang Li, Yue Gu, Ting Shu He, Ren He Yang, Wan Shen Wang
Therefore, PCEs with different molecular structures might play different roles in practical applications.
The chemical structure and schematic of the PCEs are shown in Figs.1 and 2.
Results and Discussion PCEs structure characterization.
Predicting hydration reactivity of Cu-doped clinker crystals by capturing electronic structure modification, ACS Sustainable Chemistry and Engineering. 7(2019) 6412-6421
Influence of silica fume and PCE dispersant on hydration mechanisms of cement, The Journal of Physical Chemistry C. 120(2016) 26814- 26823
The chemical structure and schematic of the PCEs are shown in Figs.1 and 2.
Results and Discussion PCEs structure characterization.
Predicting hydration reactivity of Cu-doped clinker crystals by capturing electronic structure modification, ACS Sustainable Chemistry and Engineering. 7(2019) 6412-6421
Influence of silica fume and PCE dispersant on hydration mechanisms of cement, The Journal of Physical Chemistry C. 120(2016) 26814- 26823