24小时热门版块排行榜

返回列表

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

Ruoming

新虫 (初入文坛)

应助: 0 (幼儿园)
金币: 17.5
帖子: 27
在线: 11.9小时
虫号: 1134439
注册: 2010-10-29
专业: 材料

[交流] 澳洲UNSW招收PhD学生，有奖学金申请机会，last minutes 已有6人参与

澳洲 UNSW 招收公派PhD数名，
专业方向Advanced Electronic and Photonic Materials，
选派专业
材料物理化学
提醒大家时间紧迫，报名从速！！！
语言要求：IELTS最低6.5，各项最低不低于6
               iBT 最低90，写作不低于24
For project one, two, three, please feel free to contact with    sean.li@unsw.edu.au (http://www.materials.unsw.edu.au/staff/sean-li)
For project four, five, six, please feel free to contact with       jiabao.yi@unsw.edu.au (http://www.materials.unsw.edu.au/staff/jiabao-yi)

任何关于公派出国的问题，可以联系我本人 r.tian@student.unsw.edu.au
下面是具体专业介绍：
PROJECT ONE

Development of High Performance Ceramic Based Thermoelectric Materials for Power Regeneration Applications

Most of the energy we use today is discharged as waste heat into environment.  Such exhaust heat reaches ~70% of our primary energy usage and is a major contributor to global warming.  This waste energy can be recovered to electrical power to reduce CO2 emissions through thermoelectric conversion by using advanced materials.  This program is aimed at experimental and theoretical development of high performance thermoelectric materials to enable the conversion of waste heat to electrical power with efficiency greater than 30% by correlating the effects of composition, atomic arrangement, electronic band structure and magnetism on physical properties of thermoelectric materials.

PROJECT TWO
Development of Advanced Diluted Magnetic Semiconductors for Spin Transistors

Spin injection is a critical requirement for the development of spin-transistors.  Future progress in this spin-polarized transport behaviour will largely driven by the materials advances.  However, lack of suitable spin-polarized materials, allowing spin-polarized carriers to be efficiently injected, transported and manipulated in semiconductor heterostructures, has impeded the progress.  This program is aimed at experimental and theoretical development of novel materials having spin transport properties at ambient temperature with high injection efficiency and carrier concentration based on understanding the fundamental spin interactions in solid-state materials as well as the roles of dimensionality, defects, and semiconductor band structure in modifying these dynamics.

PROJECT THREE

Development of High-Performance Lead-Free Piezoelectric Superlattices for Environmentally-Friendly and Biocompatible Piezoelectric Micromachined Ultrasonic Transducers (pMUTs) Applications

The proposed program is aimed at experimental and theoretical development of environmentally friendly and biocompatible lead-free piezoelectric thin films and superlattices for the potential applications in implantable medical imaging devices e.g. pMUTs. The practical application of thin film lead-free piezoelectrics would be a scientific and technological breakthrough, but also contribute to the ecological goals of Australia. The expected outcome of this program includes deposition of high-performance (Bi,Na)TiO3 and Ba(Zr,Ti)O3- based lead-free thin films and superlattices and enhancement of their physical properties by utilizing strain and interface engineering. Domain evolution and leakage current phenomenon will be also investigated.

PROJECT FOUR
Magnetic quantum dots with high concentration of dopants:
Magnetic semiconductors have attracted wide interest due to its potential for the applications of spintronic devices, which utilize both charge and spin freedom for the fabrication of stat-of-art electronics devices, such as spin-LED, spin-FET, and quantum computer, aiming for the low power consumption, high speed, high density and devices in one chip, i.e. quantum computers. Quantum dots of magnetic semiconductors are attractive materials for the potential of quantum information applications. Interesting properties, such as giant Zeeman splitting and Kondo effect has been observed. Recently, we have developed a hydrothermal method for effectively doping high concentration of dopants. In this project, we will use this method for fabricating Cu doped ZnO quantum dots. In thin film state, Cu doped ZnO has been confirmed a good magnetic semiconductor and a multiferroic material with high doping concentration [Adv. Mater.23, 1635 (2011); Phys. Rev. Lett. 105, 207201 (2010)]. In addition, Cu doping has been considered as one of the elements enabling tuning the bandgap of ZnO, which shows promising potential in the energy harvesting. We will study the effective doping of Cu ions by means of XRD, UV and PL spectroscopy, as well as EXAFS. In addition, N codoping will be used to explore the possibility of high efficient solar energy conversion. The magnetic and multiferroic properties will be measured and analysed.

PROJECT FIVE
Electric field effect of magnetic semiconductor films:
The semiconductor process has used 32 nm techniques for fabricating semiconductor devices. The limitation of further shrinking the device size will impede the development of future advanced devices. In recent years, people has proposed spintronics devices, which both use charge and spin freedom for the device switch rather than charge alone in current semiconductor technology. For the achievement of spintronics device, we must develop qualified and high quality materials for this effort. Oxide magnetic semiconductor is one of the promising materials due to the high Curie temperature. For the integration of the magnetic semiconductor materials into current semiconductor technology, the functionality of this material must be able to be controlled and tuned by electric field. Hence, carrier mediation in magnetic semiconductors is one of the ultimate goals for the development of qualifying material.  We have developed a series of advanced magnetic semiconductor materials. Theoretical modelling and indirect experiment evidence have shown that the magnetic properties of these materials are carrier mediated. However, no detail electric field control experiment has been performed yet. In this project, we will choose several our previous magnetic semiconductor materials, such as C-ZnO, Cu-ZnO and Co-TiO2. Electric field will be applied for the measurement of magnetic properties through anomalous Hall effect using physical properties measurement system (PPMS). In addition, the electric effect will also be examined by domain evolution during the application of electric field using our magnetic force microscopy. Normal characterization techniques, such as XRD, SEM and TEM will also be employed to examine the phases and microstructures of the samples. This project is essential toward the practical application of magnetic semiconductors for spintronic devices.

PROJECT SIX
Magnetic nanoparticles for bioapplications such as Magnetic resonance image (MRI), hyperthermia, and drug delivery. In the last few years, we have fabricated Fe3O4 nanoparticles and its applications in hyperthermia and MRI due to its non-toxic and environment friendly behaviour. In addition, the shape effect of Fe3O4 on the applications has been investigated. Utilizing the unique properties of nanorings, we have successfully applied Fe3O4 nanorings in the MRI with 10 times contrast enhancement compared with normal spherical Fe3O4 nanoparticles. In the new project, we will continue use Fe3O4 nanorings for the applications in the imaging, hyperthermia and drug delivery by combining with surface enhanced Raman scattering. This multifunctional nanoprobe can be used not only imaging, but also cell labelling, drug delivery and hyperthermia.

[ Last edited by flyingskynk on 2012-5-18 at 23:24 ]

回复此楼