Wood Functional Modification Based on Deposition of Nanometer Copper Film by Magnetron Sputtering

2020 ◽  
Vol 70 (3) ◽  
pp. 340-349
Author(s):  
Jingkui Li ◽  
Yanan Wang ◽  
He Tian ◽  
Dawei Qi ◽  
Ruoying Wang
Keyword(s):  
Electrical Conductivity ◽  
Magnetron Sputtering ◽  
Physical Properties ◽  
Sheet Resistance ◽  
Wood Surface ◽  
Room Temperature ◽  
Copper Film ◽  
Base Temperature ◽  
Wood Veneer ◽  
Thin Copper Film

Abstract It can be helpful for selected applications to improve the functionality of wood by compounding nano-metal materials with wood, endowing the wood surface with certain physical properties, for example, metallicity, electrical conductivity, and hydrophobicity. Therefore, in this study, a thin copper film was deposited on the surface of Pinus sylvestris L. var. mongholica Litv. veneer by magnetron sputtering. The film was applied at both room temperature and 200°C to obtain nano-copper–wood composites. The physical properties of wood-based nano-metal composites were characterized. The results indicated that the wood veneer metallization had no effect on the crystallization zone of wood; there were still wood cellulose characteristic peaks, but the intensity of the diffraction peak decreased. At the same time, there were characteristic diffraction peaks of copper. The mechanical properties of the wood veneer surface changed greatly; the surface of copper-plated wood veneer had good electrical conductivity and the wettability of the wood surface transformed from hydrophilic to hydrophobic. When the base temperature was 200°C, not only was the sheet resistance of the sample with coating time of 15 minutes about 4.6 times that of the sheet resistance of the sample at room temperature, but also the quality of the copper film on the wood surface was better than that at room temperature. The copper film was mainly composed of small particles with a compact arrangement.

scholarly journals Research on the Gradual Process of the Metallization Structures and Mechanical Properties of Wood Veneer

Symmetry ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 550 ◽  
Author(s):  
Jingkui Li ◽  
Ruoying Wang ◽  
He Tian ◽  
Yanan Wang ◽  
Dawei Qi
Keyword(s):  
Mechanical Properties ◽  
Magnetron Sputtering ◽  
Wood Surface ◽  
Deposition Time ◽  
Copper Film ◽  
Wood Cellulose ◽  
Wood Veneer ◽  
Gradual Process ◽  
Veneer Surface ◽  
Moduli Of Elasticity

In order to improve the mechanical properties of the wood surface and explore the mechanical effect of wood veneer surface metallization, the 31-year-old Pinus sylvestris is taken as the research object and Cu is deposited on the wood surface by magnetron sputtering to achieve wood veneer metallization. Based on X-ray diffraction (XRD) and nanoindentation, a research on the gradual process of the structures and mechanical properties of wood veneer metallization was carried out. The results indicate that wood veneer metallization does not affect the crystallization zone of wood, there are still wood cellulose characteristic peaks and the crystalline structure of the wood cellulose is not damaged; the thickness of the copper thin film increases with the increase of the deposition time, the cellulose characteristic peak strength gradually decrease, and the relative crystallinity also decreases; the characteristic diffraction peaks of Cu (111), Cu (200), and Cu (220) appear near the diffraction angle 2θ which is equal to 43.3°, 50.4°, and 74.1°, and the diffraction peak intensity increases with increase of deposition time, the copper film of the metal wood veneer crystallizes well; the load–displacement of wood veneer decreases significantly with the increase of deposition time, while the moduli of elasticity and hardness increase rapidly. The load–displacement of the samples which were coated for 15 min decreased by 80%, while the moduli of elasticity and hardness of these samples increased by 24.1 times and 17.3 times, respectively. From the results of Scanning Electron Microscope (SEM) measurement of the metallization of wood veneer, it can be seen that the uniform and continuous copper film can be formed on the wood veneer surface by using the magnetron sputtering method. This paper provides a basis for wood veneer surface metallization, which is of great significance for the functional improvement of wood, the expansion of wood application fields, and the enhancement of added value.

Interaction of Copper Film with Silicides

1990 ◽  
Vol 181 ◽  
Author(s):  
Yow-Tzong Shy ◽  
Shyam P. Murarka ◽  
Carlton L. Shepard ◽  
William A. Lanford
Keyword(s):  
Sheet Resistance ◽  
Diffusion Barrier ◽  
Room Temperature ◽  
Copper Film ◽  
Furnace Annealing ◽  
Rutherford Back Scattering ◽  
Annealing Temperatures ◽  
Back Scattering ◽  
The Stability ◽  
Stable Structures

ABSTRACTBilayers of Cu with TiSi2 and TaSi2 were tested by furnace annealing at temperatures from 200 to 500°C. Rutherford Back Scattering (RBS) technique was used to investigate the interaction between various films and determine the stability of Cu on silicide structures. The sheet resistance was also monitored. The results show that Cu on TiSi2 and TaSi2 structures are extremely stable structures at annealing temperatures in the range of room temperature to 500 °C. In such structures, therefore, there will not be a need of any diffusion barrier between Cu and the silicide films.

scholarly journals Magnetron Sputtering Construction of Nano-Al Metallized Wood and Its Functional Research

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1564
Author(s):  
Yanan Wang ◽  
Chengzhu Jin ◽  
Xinyi Wang ◽  
Qiushuang Li ◽  
Wenxuan Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Magnetron Sputtering ◽  
Sheet Resistance ◽  
Wood Surface ◽  
Functional Improvement ◽  
Material Structure ◽  
Wetting Properties ◽  
Al Metallization ◽  
Wood Surfaces

The magnetron sputtering method was used to deposit nano-Al film on the wood surface of Pinus sylvestris L. var. mongholica Litv., and the material structure, electrical conductivity, mechanical properties and wetting properties were tested and characterized. When the sputtering time was 60 min, the average cross-grain sheet resistance of metallized wood was 695.9 mΩ, and the average along-grain sheet resistance was 227.2 mΩ. Load displacement decreased by more than 88%,elastic modulus increased by 49.2 times, hardness increased by 46 times andsurface hydrophobic angle was close to 130°. The grain size of the Al film on the wood surface was presented as nanoparticles, and the arrangement was uniform and dense. The results indicate that without any burden on the environment, the use of magnetron sputtering can quickly and efficiently achieve Al metallization on wood surfaces, so that the wood surface can obtain conductivity and hydrophobic properties. The elastic modulus and hardness of the wood surface were improved, the mechanical properties of the wood were effectively improved and the functional improvement of the wood was realized. This study provides a feasible method and basis for the study of the simple, efficient and pollution-free modification of wood.

The Role of Surface Physical Properties on Blood Compatibility of Titanium Oxide Films Synthesized by Unbalanced Magnetron Sputtering

2005 ◽  
Vol 288-289 ◽  
pp. 311-314 ◽  
Author(s):  
Yong Xiang Leng ◽  
Ping Yang ◽  
Ji Yong Chen ◽  
Lan Xin Xu ◽  
An Sha Zhao ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Physical Properties ◽  
Titanium Oxide ◽  
Sheet Resistance ◽  
Oxygen Pressure ◽  
Carrier Density ◽  
Blood Compatibility ◽  
Oxide Films ◽  
X Ray ◽  
Titanium Oxide Films

Surface modification has shown great potential for improving the hemocompatibility of biomedical materials and devices. In this paper we describe our work on improving blood compatibility with Ti–O thin films prepared by unbalanced DC magnetron sputtering. The structure and surface chemical and physical properties of the films were characterized by X-ray diffraction, X-ray photoelectron spectroscopy (XPS), SEM, sheet resistance tests, and Hall effect measurements. The sheet resistance of the titanium oxide samples increased with oxygen pressure and shows a sharp increase when only TiO2 exists in the films. The band gap, carrier density and sheet resistance of the titanium oxide films synthesized at different oxygen pressure are different. These properties affect blood compatibility significantly. We suggest that the semiconducting nature of n-type Ti–O films with bandgap 3.0~3.2 eV, sheet resistance greater than 1 Ω.cm and carrier density of about 1.17 x 1016cm-2 leads to their excellent blood compatibility.

scholarly journals Microstructure and Hydrophobic Properties of Nano-Cu-Coated Wood-Based Composites by Ultrasonic Pretreatment

2020 ◽  
Vol 10 (16) ◽  
pp. 5448
Author(s):  
Hongbo Mu ◽  
Yanan Wang ◽  
Yongqi Tian ◽  
Xiaoming Duan ◽  
Jingkui Li ◽  
...  
Keyword(s):  
Composite Materials ◽  
Magnetron Sputtering ◽  
Metallic Copper ◽  
Copper Film ◽  
Added Value ◽  
Practical Significance ◽  
Wood Veneer ◽  
Hydrophobic Properties ◽  
Water Contact ◽  
Wood Based Composite

The combination of nano-metal and wood to prepare copper-coated wood-based composite materials has important research value and practical significance for improving the function of wood, expanding the application field of wood, and adding added value. In this paper, 31-year-old wood (Pinus sylvestris L. var. mongholica Litv) veneer was taken as the research object. The wood veneer was pretreated by ultrasonic wave, and copper film was deposited on the surface of the wood veneer by magnetron sputtering to prepare “environmentally friendly” copper-plated wood-based composite materials. The microstructure and hydrophobic properties of Cu-coated wood-based composites were characterized and studied. With the increase in coating time, the diffraction peak intensity of wood cellulose gradually decreased, and the diffraction peaks of Cu (111), Cu (200), and Cu (220) of metallic copper appeared. Under the sputtering condition of a substrate temperature of 200 °C, the copper film deposit on the surface of the wood was uniform and densely arranged. The surface water contact angle reached 149.9°. Ultrasonic treatment increases the porous structure of wood, and the rough metal copper film interface was constructed on the surface of wood by magnetron sputtering to transform the surface wettability of the wood from hydrophilic to super-hydrophobic. The lotus leaf effect was realized on the wood surface.

On The Thermoelectric Power And Transport Properties Of Quasicrystals

1998 ◽  
Vol 553 ◽  
Author(s):  
F. Cyrot-Lackmann
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Fermi Surface ◽  
Physical Properties ◽  
Thermoelectric Power ◽  
Thermoelectric Materials ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Phonon Drag ◽  
Crude Estimate

Stable quasicrystals exhibit specific and unusual physical properties, such as, diamagnetism, low electrical conductivity, low thermal conductivity, and large themoelectric power at room temperature. These properties can be understood with a Bragg's reflexions scheme due to their dense filled reciprocal space.This leads to small gaps on the Fermi surface (some tenths of eV), much narrower than the usual Hume-Rothery ones (of order of 0.5 eV) which explain their stability. These gaps lead to the existence of quasi Umklapp processes, crucial for the interpretation of thermoelectric power. In some cases, the positive phonon drag contribution due to Umklapp processes, add with the electronic one's and dominates at room temperature with a large positive thermoelectric power. A crude estimate of the figure of merit gives some hope for applications of some quasicrystals and high approximants as new thermoelectric materials.

scholarly journals Physical properties of reactive RF sputtered a-IZON thin films.

2019 ◽  
Vol 65 (2) ◽  
pp. 133
Author(s):  
J. J. Ortega ◽  
C. R. Escobedo-Galván ◽  
F. Avelar-Muñoz ◽  
A. A. Ortiz-Hernández ◽  
H. Tototzintle-Huitle ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Physical Properties ◽  
Room Temperature ◽  
Amorphous Material ◽  
Optoelectronic Devices ◽  
Rf Magnetron Sputtering ◽  
High Transparency ◽  
Reactive Rf Magnetron Sputtering ◽  
Incorporated Nitrogen

The physical properties of amorphous indium zinc oxynitride (a-IZON) thin films, which were deposited at room temperature by reactive RF magnetron sputtering, were investigated. The results of the investigations indicated that the a-IZON films possessed excellent qualities: high transparency with a very low resistivity from 10-3 Ω∙cm to 10-4 Ω∙cm, while the carrier concentration showed values over 1020 cm-3 with mobility between 10 and 21 cm2⸱V-1⸱s-1. The incorporated nitrogen reduces the typical crystallization of IZO and favors the deposition of transparent thin films. These results show that the IZON is an ideal amorphous material for applications in transparent and flexible optoelectronic devices.

COPPER ALLOY No. 803

Alloy Digest ◽  
1979 ◽  
Vol 28 (4) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Elevated Temperature ◽  
Physical Properties ◽  
Copper Alloy ◽  
Room Temperature ◽  
Heat Treating ◽  
Softening Temperature ◽  
Good Combination ◽  
Room Temperature Strength

Abstract Copper No. 803 is cast copper containing silver to raise its softening temperature and improve its elevated-temperature properties. It has low room-temperature strength with medium-to-good ductility. It is characterized by a good combination of thermal and electrical conductivity and is resistant to corrosion. These characteristics make it highly suitable for many applications requiring good conductivity and/or corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: Cu-370. Producer or source: Copper alloy foundries.

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