Judul: Sintesis dan Karakterisasi Film Tipis Litium Niobat (LiNbO3) Didadah Galium Oksida (Ga2O3)
Abstrak: Film LiNbO3 dengan beberapa persentase pendadah Ga2O3 (0%, 2%, 4%, 6%) berhasil dibuat menggunakan metode Chemical Solution Deposition (CSD). Selain itu, pembuatan film LiNbO3 menggunakan teknik spin coating dengan kecepatan putar 8000 rpm telah berhasil dibuat di atas substrat silikon (100) tipe-p. Suhu yang digunakan pada saat proses annealing sebesar 850oC dan ditahan selama 8 jam dengan kelajuan suhu sebesar 1,67oC/menit, lalu mengikuti proses pendinginan hingga suhu kamar selama 13 jam. Film LiNbO3 yang didadah Ga2O3 (0%,2%,4%,6%) menghasilkan energi bandgap berkisar antara 3,6554 eV sampai 3,7232 eV. Hasil parameter kisi a dan c yang didapatkan pada karakterisasi XRD sebesar 5,411Ǻ; 5,248Ǻ; 5,190Ǻ; 5,084Ǻ dan 14,745Ǻ; 14,348Ǻ; 14,069Ǻ; 13,464Ǻ. Hasil analisis menggunakan perangkat lunak MAUD dan data literatur mendapatkan parameter kisi a dan c sebesar 5,091Ǻ; 5,192Ǻ; 5,163Ǻ; 5,057Ǻ dan 14,274Ǻ; 14,204Ǻ; 13,880Ǻ; 13,487Ǻ. Analisis hasil menggunakan perangkat lunak MAUD dapat diperoleh visualisasi struktur kristal heksagonal pada film LiNbO3., LiNbO3 film with some percentage of Ga2O3 concentration (0%, 2%, 4%, 6%) has been successfully made using the CSD method. In addition, the manufacture of LiNbO3 films using the spin coating technique with a rotational speed of 8000 rpm has been successfully made above 100 p-type silicon substrate. The temperature used during the annealing process is 850C and holds for 8 hours with a temperature speed of 1.67C /minute, then follows the cooling process to room temperature for 13 hours. The LiNbO3 film doped Ga2O3 variation concentration (0%, 2%, 4%, 6%) had a bandgap energy value ranging from 3,6554 eV sampai 3,7232 eV. The results of the lattice parameters a and c obtained based on XRD characterization are 5,411Ǻ; 5,248Ǻ; 5,190Ǻ; 5,084Ǻ dan 14,745Ǻ; 14,348Ǻ; 14,069Ǻ; 13,464Ǻ. The results of the analysis using MAUD software and data literature get lattice parameters a and c of 5,091Ǻ; 5,192Ǻ; 5,163Ǻ; 5,057Ǻ and 14,274Ǻ; 14,204Ǻ; 13,880Ǻ; 13,487Ǻ. In addition the results of the analysis using MAUD software can know the crystal structure hexagonal visualization on the LiNbO3 film.
Keyword: Chemical Solution Deposition, Ga2O3, LiNbO3

Judul: Pembuatan Film Litium Niobat (LiNbO3) Didadah Variasi Konsentrasi Cerium Oksida (CeO2) Melalui Metode CSD
Abstrak: Pembuatan film litium niobat (LiNbO3) telah berhasil dilakukan di atas substrat Si (100) tipe-p dengan metode chemical solution deposition (CSD) dan variasi pendadah CeO2 0%, 2%, 4%, 6% dan konsentrasi larutan perkusor 1M. Pembauatan film ini menggunakan teknik spin coating dengan kecepetan putar 8000 rpm. Film yang sudah jadi di annealing dengan suhu 850 °C dan ditahan selama 8 jam dengan kenaikan 1.67 °C/menit. Energi bandgap film LiNbO3 yang dihasilkan sebesar 3.56 eV sampai 4.14 eV dengan indeks bias 2.21413661 sampai 2.2141669. Karakterisasi menggunakan XRD diperoleh struktur kristal berbentuk heksagonal dengan nilai parameter kisi a sebesar 5.05 Å sampai 5.67 Å dan c sebesar 13.18 Å sampai 15.80 Å. Dari hasil analisa perangkat lunak Mineral Analysis Using Diffraction (MAUD) didapatkan nilai kecocokan Sigma sebesar 1.91% sampai 20.04% dan nilai kecocokan Rexp sebesar 4.62 % sampai 16.92%.
Keyword: energi bandgap, LiNbO3, CeO2, CSD

Judul: Kajian Q fever pada Sapi Perah Impor dari Australia yang Masuk Melalui Bandar Udara Soekarno-Hatta
Abstrak: Q fever is worldwide distributed zoonosis caused by Coxiella burnetii. This intracelluar bacterium infects a wide range of animals and associated with reproductive disorders in domestic ruminants. It can lead an acute and chronic infections and caused flu-like syndrome, hepatitis, pneumonia or endocarditis. The aim of this research is to study Q fever in imported dairy cattle from Australia through the Soekarno-Hatta airport. Forty-six samples of serum and whole blood were taken from imported dairy cattle. Two diagnostic methods used in this study were serological test using enzyme-linked immunosorbant assay (ELISA) and nested polymerase chain reaction (nested PCR). The result of serological test showed that 23 (50%) out of 46 samples were positive but Coxiella burnetii DNA were not detected by nested PCR. These data revealed that Q fever have infected imported dairy cattle from Australia through Soekarno-Hatta airport with 50% of seroprevalence.
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