Plasmonic filters have recently become a topic of significant interest because they are suitable for a wide range of applications. However, effective fabrication of plasmonic filters remains a challenge. In this paper, we demonstrate a simple method for fabricating plasmonic color filters based on nanotransfer printing (nTP) , using SiO as a hard mask for Al etching. nTP was performed on a 100 nm Al layer deposited on a glass wafer substrate with a 10 nm Al layer and a 20 nm SiO layer with a nanohole pattern. The 10 nm Al layer and 20 nm SiO layers were previously transferred from a polymer stamp prepared to create patterns of subwavelength-sized holes. The plasmonic filters were ultimately fabricated using the SiO layer as a hard mask to selectively etch the Al layer. The optical properties of the fabricated plasmonic filters were evaluated using experimental and simulation tools. In addition, we analyzed the results of nTP on the Al and SiO films by varying the temperature, pressure, and SiO-film thickness. We believe that this technique is a promising method for fabricating nanostructures and for widening the scope of practical application of plasmonics because of its high efficiency and cost-effectiveness.
Bioactivity-directed isolation has led to the isolation of (-)-ent-costunolide (1) as the major active compound from Hepatostolonophora paucistipula. This compound (1) was determined by spectroscopic data interpretation. This sesquiterpene lactone (1) inhibited the growth of the dermatophytic fungus Trichophyton mentagrophytes ATCC 28185, (4 mm inhibition zone at 15 µg/ disc), cytotoxic activity to murine leukaemia cell lines ATCC CCL 46 P 388D1 (IC 5 0 687 ng/ml, at 0.075 µg/disk), BSC monkey kidney cell lines (100% of well at 15 µg/disk) and antiviral activity to Herpes simplex virus (0.25 mg/ml, 100% of well at 7.5 µg/disk) and Polio virus (0.125 mg/ml, 100% of well at 3.75 µg/disk). These results suggest that (-)-ent-costunolide (1) has potential antimicrobial and cytotoxic agents.
The cytotoxic activity was strongly shown by (-)-ent-costunolide (1) (P388; IC 50 : 687 ng/mL) which isolated from Hepatostolonophora paucistipula. These results suggest that (-)-entcostunolide (1) has a potential cytotoxic activity.
This study investigated 355nm UV-pulsed laser processing of a 150 thick film of polypropylene filled with copper particles. Generally, processing polypropylene with a low beam energy UV laser is difficult because the material's absorption rate is less than 1% in UV wavelengths. However, polypropylene filled with copper particles is easily processed by UV laser, because copper has a UV absorption rate of more than 70%. The absorbed heat of the copper is transmitted to the polypropylene, accomplishing the machining process. Experimental results were observed while changing the laser processing speed rate. Also, the mechanism of the experimental results was investigated theoretically and experimentally.
Medicinal plants containing wellness-fusion-complex compound are increasingly being pursued as suitable alternative sources of various biological properties. In this study, inhibitory effect of Quintinia acutifolia, which is a New Zealand plant, on P388 murine lymphocytic leukemia cells using MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide] assay. Based on 1
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