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Ditemukan 3347 dokumen yang sesuai dengan query
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Schroder, Dieter K.
New York: John Wiley & Sons, 1998
621.381 SCH s
Buku Teks  Universitas Indonesia Library
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New York: McGraw-Hill, 1988
621.395 SEM
Buku Teks  Universitas Indonesia Library
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New York: McGraw-Hill, 1988
621.38152 SEM
Buku Teks  Universitas Indonesia Library
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"Buku yang berjudul "Handbook on semiconductor : device physics" ini merupakan sebuah buku panduan mengenai semikonduktor. "
Amsterdam: North-Holland, 1981
R 621.381 5 HAN
Buku Referensi  Universitas Indonesia Library
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Hana Nabila Anindita
"Dalam penelitian ini dilakukan pembuatan komposit semikonduktor dengan menggunakan matriks akrilik yang ditambahkan dengan dua jenis filler yakni ZnO dan serat nata de coco. Tujuan dari penelitian ini adalah untuk mendapatkan material komposit semikonduktor yang memiliki kekuatan mekanik, serta ketahanan termal yang baik. Metode yang digunakan adalah polimerisasi in situ dimana filler dan monomer matriks yang berupa resin dicampurkan kemudian ditambahkan katalis sebanyak 1% berat resin untuk mempercepat polimerisasi sehingga didapat komposit dengan filler yang terdistribusi di dalam polimer akrilik setelah didiamkan selama 12 jam. Komposit ini kemudian diukur modulus elastisitas, suhu transisi gelas, serta konduktivitas listriknya. Penambahan filler nata de coco mampu meningkatkan modulus elastisitas dan suhu transisi gelas dari akrilik. Modulus elastisitas serta suhu transisi gelas tertinggi dicapai oleh komposit akrilik/nata de coco dengan persen volume sebesar 30% yakni 2,68 GPa dan 199,47oC.
Secara umum penambahan filler ZnO dan nata de coco meningkatkan konduktivitas dari komposit. Komposit yang dihasilkan dapat dinyatakan sebagai material semikonduktor karena berada pada rentang konduktivitas 10-8-103 S/cm. Komposit dengan sifat semikonduktor yang paling baik adalah komposit akrilik/ZnO dengan persen volume ZnO sebesar 30% dengan konduktivitas sebesar 2,7 x 10-7 S/cm. Komposit dengan kombinasi filler ZnO sebesar 20% dan nata de coco 10% volume memberikan modulus elastisitas serta suhu transisi gelas yang lebih tinggi dari komposit akrilik/ZnO yakni mencapai 1,79 GPa dan 175,73oC. Sementara konduktivitas dari komposit tersebut lebih tinggi dari konduktivitas akrilik/nata de coco yakni mencapai 1,9 x 10-7 S/cm.

Synthesis of semiconductor composite using acrylic matrix filled with ZnO and nata de coco fiber has been conducted in this research. The purpose of this research is to obtain semiconductor composite material that have a good mechanical strength and thermal resistance. In situ polymerization method is used in this research where fillers and matrix monomer are mixed and then 1%wt of catalyst is added into the mixture to make it polymerizes faster. After 12 hours, the composite with acrylic matrix and filler is ready to be characterized. Three parameters are characterized in this research such as elastic modulus, glass transition temperature, and electric conductivity of the composite. The addition of nata de coco filler can increase the elastic modulus and glass transition temperature of the acrylic. The highest elastic modulus and glass transition temperature is obtained from acrylic/nata de coco composite with 30% filler volume percentage that reach 2,68 GPa and 199,47oC.
In general the addition of ZnO and nata de coco filler can increase the conductivity of the composite. The composites that has been made in this research can be classified as semiconductor material because the conductivity is in the range of 10-8-103 S/cm. Composite that has a high semiconductor characteristic is obtained from acrylic/ZnO composite with 30% filler volume percentage that reach 2,7 x 10-7 S/cm. The composite with 20% volume of ZnO filler and 10% volume of nata de coco gives a higher elastic modulus and glass transition temperature than those in acrylic/ZnO composite that reach 1,79 GPa and 175,73oC. In addition, the conductivity of this composite is 1,9 x 10-7 S/cm which is higher than the conductivity of acrylic/nata de coco composite.;
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Depok: Fakultas Teknik Universitas Indonesia, 2015
T44494
UI - Tesis Membership  Universitas Indonesia Library
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"This book presents the fabrication of optoelectronic nanodevices. The structures considered are nanowires, nanorods, hybrid semiconductor nanostructures, wide bandgap nanostructures for visible light emitters and graphene. The device applications of these structures are broadly explained. The book deals also with the characterization of semiconductor nanostructures. "
Berlin: Springer, 2012
e20406047
eBooks  Universitas Indonesia Library
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Zhang, Sam
Boca Raton: CRC Press, 2009
620.1 ZHA m
Buku Teks SO  Universitas Indonesia Library
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Tampubolon, Berlian
"A fabrication and application of planar micro-lens is presented in this thesis. With the goal of alignment free of the optical component, a branching circuit have been considered.
Even now, the alignment of optical components is still a problem. The advantages of the branching circuit consists of planar micro-lens is easy to connect with other optical component. Since integration of optical subsystems which allows the easy alignment and high efficiency is strongly required for future networks. But, the easier fabrication and complete alignment free of the system will be continued.
In this study, the optical micro-device component which using axial focusing scheme of planar micro-lens is carried outs and the easy aligning optical system technology will be discussed."
Depok: Universitas Indonesia, 1996
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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"Cbaracterization of tbe properties of microwave device proves to be an .. senlial complemenl 10 Ibe
tbeoretical or simulaUon works. Tbus, Ibe .. tablishment of tool used for tbe cbaraclerization Is one of Ibe
important steps in tbe experimeDtal sludy. In this paper, a test-fixture to cbaracterize tbe reflectivity aDd
traDsmissivity of microwave device is reported wbereby tbe refleelion and traDsmission properties caD be
obtained under normal incidence using a specially designed paraUel plate waveguide (PPW) simulator.
Tbis Is possible siDce tbis type of simulator is potentially \
transmission response tbrougb tbe use of tbe available 3-dimension electromagnetic (3D EM) software.
Tbe simulator Is designed numerically to work for 2.60 GHz to 3.95 GHz operation, witb waveguide
transducen type WGIO used for tbe wave exciter. After optimizing some parameten, tbe simulator witb
plate widlb of 200 mm, plate separatioD of 75 mill, and taper lengtb of 100 mm is tbeD fabricated. This
was followed by tbe experimental measurement, taken to be compared witb tbe design result. Some
cbaracterization of 3 GHz microwave devices including a sample of frequeDcy selective surfaces (FSS) aD-d
microwave absorber is also demonstrated, from wbicb tbe results are tben compared witb tbe simulatelr
ones. "
620 JURTEL 16:2 (2011)
Artikel Jurnal  Universitas Indonesia Library
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Masripah
"ABSTRAK
Kebutuhan akan semikonduktor pada perangkat listrik yang memiliki ketahanan yang baik dikondisi lingkungan ekstrim membuat silikon karbida SiC menjadi pilihan yang sangat menjanjikan. SiC dapat diaplikasikan untuk daya tinggi, frekuensi tinggi, dan suhu tinggi. SiC memiliki sifat semikonduktor intrinsik dengan banyak kelebihan dibandingkan semikonduktor silikon. SiC merupakan bahan dengan konduktivitas panas yang tinggi serta memiliki sifat yang stabil terhadap mekanik dan kimia serta tahan terhadap radiasi. Dalam penelitian ini telah dilakukan sintesis serat SiC dengan prekursor polimer polycarbosilane PCS menggunakan metode elektrospinning dengan pelarut N,N-dimetilformamida DMF dan toluena. Metode elektrospinning ini sangat baik untuk membuat serat dengan diameter yang terkontrol dan kurang dari 10 m. Tegangan pada proses elektrospinning divariasikan untuk mengetahui pengaruhnya terhadap diameter serat yang dihasilkan serta dilakukan pula variasi suhu pada proses pirolisis untuk mengetahui proses degradasi kimia pada saat pembentukan serat SiC dari serat PCS. Serat SiC yang diperoleh kemudian dikarakterisasi dan diuji sifat kelistrikannya. Hasil karakterisasi menunjukkan serat SiC telah berhasil disintesis dengan metode elektrospinning yang kemudian melalui tahapan proses curing dan pirolisis. Morfologi serat yang dihasilkan yaitu berbentuk pipa dan memiliki keseragaman yang baik. Semakin meningkatnya tegangan selama proses elektrospinning serta dengan bertambahnya suhu pirolisis memberikan diameter serat yang lebih kecil dengan diamater rerata sebesar 4,3 m . Sifat kelistrikan serat SiC hasil sintesis memiliki band gap 2,56 eV dan area nilai konduktivitas listriknya adalah dari 8 10-6 hingga 7 10-6 S/cm.

ABSTRACT
The need for semiconductors in electrical devices that have good resistance in extreme environment conditions make silicon carbide SiC very promising choice. SiC can be applied for high power, high frequency, and high temperature. SiC has intrinsic semiconductor properties with many advantages over silicon semiconductors. SiC is a material with high thermal conductivity and has properties that are mechanically and chemically stable and resistant to radiation. In this research, SiC fiber synthesis with polycarbosilane polymer precursor PCS has been done using electrospinning method with N, N dimethylformamide DMF and toluenae solvent. This electrospinning method is very good for making fibers with controlled diameters and less than 10 m. The voltage on the electrospinning process is varied to determine the effect on the fiber diameter produced and also the temperature variation in the pyrolysis process to determine the chemical degradation process at the time of fiber SiC formation of PCS fibers. SiC fibers obtained are then characterized and tested for their electrical properties. The characterization results show that SiC fibers have been successfully synthesized by electrospinning method which then through the curing process and pyrolysis stage. The resulting fiber morphology is pipe shaped and has good uniformity. The increasing stresses during the electrospinning process and with increasing pyrolysis temperature give the fiber diameter smaller with the average diameter of 4.3 m. The synthetic nature of SiC fibers has a band gap of 2.56 eV and the electrical conductivity value is from 8 10 6 to 7 10 6 S cm."
2018
T50684
UI - Tesis Membership  Universitas Indonesia Library
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