scholarly journals The effect of selective mineralization of PLLA in simulated body fluid induced by ArF excimer laser irradiation: Tailored composites with potential in bone tissue engineering

2020 ◽  
Vol 197 ◽  
pp. 108279
Author(s):  
Konrad Szustakiewicz ◽  
Bartłomiej Kryszak ◽  
Małgorzata Gazińska ◽  
Jacek Chęcmanowski ◽  
Bogusz Stępak ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Simulated Body Fluid ◽  
Bone Tissue Engineering ◽  
Laser Irradiation ◽  
Bone Tissue ◽  
Excimer Laser ◽  
Body Fluid ◽  
Excimer Laser Irradiation ◽  
Arf Excimer Laser

Evaluation of the in vitro biodegradation and biological behavior of poly(lactic-co-glycolic acid)/nano-fluorhydroxyapatite composite microsphere-sintered scaffold for bone tissue engineering

2017 ◽  
Vol 33 (2) ◽  
pp. 146-159 ◽  
Author(s):  
Mohammadreza Tahriri ◽  
Fathollah Moztarzadeh ◽  
Arash Tahriri ◽  
Hossein Eslami ◽  
Kimia Khoshroo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Weight Loss ◽  
Simulated Body Fluid ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Body Fluid ◽  
Bone Repair ◽  
Glycolic Acid ◽  
Composite Scaffold

The objective of this research was to study the degradation and biological characteristics of the three-dimensional porous composite scaffold made of poly(lactic- co-glycolic acid)/nano-fluorhydroxyapatite microsphere using sintering method for potential bone tissue engineering. Our previous experimental results demonstrated that poly(lactic- co-glycolic acid)/nano-fluorhydroxyapatite composite scaffold with a ratio of 4:1 sintered at 90ºC for 2 h has the greatest mechanical properties and a proper pore structure for bone repair applications. The weight loss percentage of both poly(lactic- co-glycolic acid)/nano-fluorhydroxyapatite and poly(lactic- co-glycolic acid) scaffolds demonstrated a monotonic trend with increasing degradation time, that is, the incorporation of nano-fluorhydroxyapatite into polymeric scaffold could lead to weight loss in comparison with that of pure poly(lactic- co-glycolic acid). The pH change for composite scaffolds showed that there was a slight decrease until 2 weeks after immersion in simulated body fluid, followed by a significant increase in the pH of simulated body fluid without a scaffold at the end of immersion time. The mechanical properties of composite scaffold were higher than that of poly(lactic- co-glycolic acid) scaffold at total time of incubation in simulated body fluid; however, it should be noted that the incorporation of nano-fluorhydroxyapatite into composite scaffold leads to decline in the relatively significant mechanical strength and modulus during hydrolytic degradation. In addition, MTT assay and alkaline phosphatase activity results defined that a general trend of increasing cell viability was seen for poly(lactic- co-glycolic acid)/nano-fluorhydroxyapatite scaffold sintered by time when compared to control group. Eventually, experimental results exhibited poly(lactic- co-glycolic acid)/nano-fluorhydroxyapatite microsphere-sintered scaffold is a promising scaffold for bone repair.

Mineralization of phosphorylated cellulose/ sodium alginate sponges as biomaterials for bone tissue engineering

2021 ◽  
Author(s):  
li Zha ◽  
Yahui Zheng ◽  
Jianfei Che ◽  
Yinghong Xiao
Keyword(s):  
Tissue Engineering ◽  
Simulated Body Fluid ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Sodium Alginate ◽  
Body Fluid ◽  
Hydroxyl Groups ◽  
Cellulose Sponge

In recent years cellulose sponge is attractive for bone tissue materials in tissue engineering, however cellulose with hydroxyl groups shows weak apatite nucleation ability in simulated body fluid (SBF). In...

Surface Alteration of Amorphous Si3N4 Films by ArF Excimer Laser Irradiation

1995 ◽  
Vol 34 (Part 2, No. 11A) ◽  
pp. L1482-L1485 ◽  
Author(s):  
Kazuo Nakamae ◽  
Kou Kurosawa ◽  
Yasuo Takigawa ◽  
Wataru Sasaki ◽  
Yasukazu Izawa ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Excimer Laser ◽  
Surface Alteration ◽  
Excimer Laser Irradiation ◽  
Arf Excimer Laser ◽  
Amorphous Si3n4

Improved Abruptness of Si/Sin Interface by ArF Excimer-Laser Pre-Annealing to Sin

1994 ◽  
Vol 345 ◽  
Author(s):  
Yasutaka Uchida ◽  
Masakiyo Matsumura
Keyword(s):  
Laser Irradiation ◽  
Excimer Laser ◽  
Field Effect ◽  
Field Effect Mobility ◽  
Resolution Limit ◽  
Laser Recrystallization ◽  
Excimer Laser Irradiation ◽  
Arf Excimer Laser ◽  
Krf Excimer Laser ◽  
Film Annealing

AbstractXPS measurement showed that undesirable SiNH component was reduced drastically from the low-temperature deposited SiN surface by intense ArF excimer-laser irradiation. Although the improved layer was as thin as 15nm, it was very effective to stop diffusion of N atoms from the bottom SiN layer to the top Si layer during the excimer-laser recrystallization step. N-diffused Si layer at the Si/SiN interface was less than the XPS resolution limit for the pre-annealed SiN structure, but about 5nm thick. As a result, the field-effect mobility of the poly-Si/SiN TFT was increased drastically by laser-irradiation to SiN film. Annealing characteristics are also presented for the various SiN film thicknesses and for both the ArF and KrF excimer-laser lights.

Carbon Film Synthesis on the Water by Excimer Laser Irradiation

1998 ◽  
Vol 555 ◽  
Author(s):  
H. Hidai ◽  
H. Tokura
Keyword(s):  
Raman Spectrum ◽  
Laser Irradiation ◽  
Excimer Laser ◽  
Carbon Film ◽  
Carbon Films ◽  
Elementary Analysis ◽  
Excimer Laser Irradiation ◽  
Ft Ir ◽  
Arf Excimer Laser ◽  
Film Synthesis

AbstractWater was used as a substrate and carbon films were obtained from methane gas on the water by ArF excimer laser. The film was analyzed by a SEM, elementary analysis, Raman spectrum and FT-IR. Moreover synthesized position of the film was studied.

Whiskerlike structure growth on silicon exposed to ArF excimer laser irradiation

1996 ◽  
Vol 69 (5) ◽  
pp. 620-622 ◽  
Author(s):  
F. Sánchez ◽  
J. L. Morenza ◽  
R. Aguiar ◽  
J. C. Delgado ◽  
M. Varela
Keyword(s):  
Laser Irradiation ◽  
Excimer Laser ◽  
Excimer Laser Irradiation ◽  
Arf Excimer Laser
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