Tii.xC0x02 thin films have been grown on n-type Si(lOO) substrates by metal organic vapor deposition (MOCVD) using titanium (IV) isopropoxide (TTIP) and tris (2,2,6,6-tetramethyl-3, 5-heptanedionato) cobalt (III) as metal organic precursors. The parameter deposition, such as: bubbler temperature of TTIP Jb(Ti) = 50°C; substrate temperature Ts = 450°C; bubbler pressure Pb(Ti) = 260 Torr; flow rate of Ar gas through TTIP precursor Ar(Ti) =100 seem (standard cubic centimeters per minute) and flow rate of oxygen gas O2 = 60 seem were found as optimal deposition parameters. The thin films deposited were have rutile (002) crystal plane, whereas those deposited at other parameter were mixing of anatase and rutile phases. Co dopant with concentration of up to 5.77% was not changes the structure of Ti02. Increase of Co incorporated in thin films was decreasing of band-gap energy.

Co-doped TiO 2 thin films were grown on Si(100) substrates by MOCVD method using titanium (IV) isopropoxide [Ti(OCH(CH3)2)4] and tris (2,2,6,6-tetramethyl-3, 5-heptanedionato) cobalt (III), Co(TMHD)3 precursors. The growth parameters, crystal structure, ferromagnetic and electrical transport properties of thin films were investigated. Ferromagnetic behaviors of films were observed at room temperature. Magnetic and structural properties strongly depend on the Co concentration and the growth temperature. Epitaxial thin films with highest magnetic saturation were found on the films grown at temperature of 450 °C. Resistivity as a function of temperature measurement shows that the films have semiconducting properties.Keywords-Ferromagnetic thin film, Co-doped TiO2 rutile and MOCVD.

Co:TiO2 (cobalt-doped titanium dioxide) thin films have been deposited on the n-type Si (100) substrate at the temperatures range of 325°C 450°C using MOCVD (metal organic chemical vapor deposition) technique. We investigated the effect of growth temperature on the structural and morphological quality of Co:TiO2 thin films. The structure of Co:TiO2 thin films were characterized by XRD while the morphology and the thickness of films were characterized by SEM. The XRD results reveal that all films show the anatase structure and the dominant orientation of anatase phase depends on the growth temperature. The grain size of crystal increases as the growth temperature increases. We also reveal that the growth rate of Co:TiO2 film has a maximum value at the growth temperature of 400°C.

Abstrak. Film tipis Ti 1-x Co x O 2 telah ditumbuhkan di atas subtrat Si dengan menggunakan teknik MOCVD. Film tipis tumbuh dengan membentuk bidang kristal anatase-213 dan tunggal. Fase kristal tunggal ini terbentuk sampai pada konsentrasi Co=5,77%. Respon emisi photoluminescence film tipis memperlihatkan puncak maksimum pada energi 2,8 eV. Penambahan konsentrasi Co tidak memberikan perubahan pada energi puncak maksimum emisi. Suatu perubahan hanya terjadi pada intensitas dan lebar pola emisi. Pelebaran mengarah ke energi yang lebih rendah dari 2,8 eV, sementara intensitas bertambah dengan bertambahnya konsentrasi atom Co. Kata kunci: Photoluminescence; Film Tipis; Ti 1-x Co x O 2 ; MOCVD.Abstract. Ti 1-x Co x O 2 thin films have been deposited on Si substrate by MOCVD technique. Thin films were synthesized by a single plane orientation structure of anatase-213 at various to Co concentartions up to 5,77%. Photoluminescence emission spectra of thin films showed a maximum peak at the energy of 2.8 eV. These energies did not change when increasing Co concentration in the Ti 1-x Co x O 2 thin films up to 5.77%. The patterns of spectrum emission only differ on the intensity and broadness of spectra. Broading occurs towards the higher energy of 2.8 eV, while the intensities were increased with increasing of Co concentration.

The bioactive compounds contained in cinnamon bark have been extracted. Extraction carried out using ethanol, methanol and water as solvents. The type of compound extracted identified by gas chromatography - mass spectroscopy (GC-MS) technique. From result the identification carried out, obtained as many as eight types of compounds, namely: using ethanol as solvent: (1) cinnamaldehyde, (2) bornylester of acrylic acid, (3) alpha-copaene, (4)Cumarine, and (5) methyl isoheptadecanoate; generated with using methanol as solvent: (6) trioctanoin and (7) 1-hydroxy-2,2-dimethyldecane; and that produced using water as a solvent is (8) 2,5-cyclooctadienol. of the eight Of these compounds, the most dominant is cinnamaldehyde. This shows that the bark Sweet has the main content, cinnamaldehyde. Because the main content is cinnamaldehyde, then cinnamon bark has the potential to be developed in the future as an ingredient herbs for, among others, as anti-diabetic and anti-viral therapy, due to cinnamaldehyde has the character of being able to lower blood sugar levels and is very attractive to weaken the virus. Keywords: Extract, bioactive compounds, cinnamon bark, Gas Chromatography, Mass Spectroscopy.