Sökning: "field induced piezoelectric effect"

Hittade 5 avhandlingar innehållade orden field induced piezoelectric effect.

1. 1. Tunable Bulk Acoustic Wave Resonators Based on BaxSr1-xTiO3 Thin Films

   Författare :John Berge; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; piezoelectric resonators; bulk acoustic wave devices; field induced piezoelectric effect; tunable devices; ferroelectric films;

   Sammanfattning : The main focus of this thesis is the study of a novel component based on ferroelectric BaxSr1−xTiO3 thin films – the tunable thin film bulk acoustic resonator (TFBAR). The tunable TFBAR utilizes a dc field induced piezoelectric effect in the ferroelectric film, in contrast to conventional fixed frequency TFBARs, widely used for filtering applications in wireless communication systems,which are based on ordinary piezoelectric materials. LÄS MER

3. 2. Switchable and tunable bulk acoustic wave resonators based on BaxSr1-xTiO3 thin films

   Författare :John Berge; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ferroelectric thin films; field induced piezoelectric effect.; tunable microwave devices; bulk acoustic wave devices; piezoelectric resonators;

   Sammanfattning : The main focus of this thesis is the study of a novel microwave component, the tunable thin film bulk acoustic wave resonator (TFBAR), based on ferroelectric BaxSr1-xTiO3 thin films. Conventional fixed frequency TFBARs, widely used for filtering applications in wireless communication systems, are based on ordinary piezoelectrics. LÄS MER

4. 3. Optical Characterization of GaN/AIGaN Quantum Well Structures

   Författare :Hamid Haratizadeh; Tatiana Shubina; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The III-nitride material family is particularly well suited for optoelectronic applications, e.g. as UV light emitters in future lighting solutions that are expected to replace the incandescent and fluorescent lamps in use today. LÄS MER

5. 4. Structural and elastic properties of InN and InAlN with different surface orientations and doping

   Författare :Mengyao Xie; Vanya Darakchieva; Jens Birch; Enrique Calleja; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : Group–III nitrides, InN, GaN, AlN, and their alloys, have revolutionized solid state lighting and continue to attract substantial research interest due to their unique properties and importance for optoelectronics and electronics. Among the group–III nitrides, InN has the lowest effective electron mass and the highest electron mobility, which makes it suitable for high–frequency and high power devices. LÄS MER

7. 5. Zinc Oxide Nanostructure Based Electrochemical Sensors and Drug Delivery to Intracellular Environments

   Författare :Muhammad Asif; Magnus Willander; Omer Nour; Sunil Bhand; Linköpings universitet; []
   Nyckelord :ZnO nanorods; Intracellular electrochemical sensor; Functionalization; Metal ions; Glucose; Human Adipocytes; Frog Oocytes; Airway surface liquid; NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : The nanoscale science and nanostructure engineering have well established in the fabrication of novel electrochemical biosensors with faster response and higher sensitivity than of planar sensor configurations. Moreover nanostructures are suggested and used as efficient carrier of photosensitizers for cancerous cell treatment. LÄS MER