this august, four members from our lab including dr. reznik, dr. radó, amy, and alex attended the canadian semiconductor science and technology conference in montreal.

in her oral presentation, dr. reznik described our work on lead oxide x-ray photoconductive layers for application in direction conversion medical imaging detectors, see image above. dr. radó also did an oral presentation about his work on stress in thick amorphous lead oxide (a-pbo) layers. our two fabulous trainees, amy stieh and alexander alexandrov, did poster presentations, see the images below. amy discussed photo-crystallization in a-pbo and alex talked about x-ray sensitivity of pbo photodetectors.

the post the 20th canadian semiconductor science and technology conference appeared first on rezniklab and posted by pavlo karasyuk.

originally published in the june 3rd, 2019 edition of the chronicle journal and submitted by the thunder bay regional health research institute (www.tbrhri.ca)

the post summer school of medical imaging gives future scientists an opportunity to sharpen their skills appeared first on rezniklab and posted by pavlo karasyuk.

the post congratulations to pavlo karasyuk on his successful msc thesis defense appeared first on rezniklab and posted by pavlo karasyuk.

the post congratulations: oleksandr bubon completed phd appeared first on rezniklab and posted by pavlo karasyuk.

abstract

while polycrystalline lead oxide (poly-pbo) is known to be one of the most promising photoconductors for utilization in x-ray detectors, its major performance parameters such as charge yield and mobility-lifetime product (μτ) are still not well established and require further investigation. combining the conventional x-ray induced photocurrent and pulse height spectroscopy techniques we examine the x-ray photogeneration and recombination processes in poly-pbo. the measurements indicate that the amount of energy required to release a single electron-hole pair w± (inverse of charge yield) strongly depends on the applied electric field and at 10 v/μm reaches ~20 ev/ehp. fitting the measured pulse height spectra with the hecht formula provided μτ for holes and electrons to be 4.1 × 10−8 cm²/v and 10−9 cm²/v, respectively. obtained μτ values combined with recently reported mobility values of charge carriers in pbo suggest a new direction towards an improvement of pbo technology by incorporation of frisch grid or x-ray transistor architectures.

continue reading the article: https://www.nature.com/articles/s41598-017-09168-3

the post congratulations to oleksii semeniuk on publishing a paper in nature scientific reports appeared first on rezniklab and posted by pavlo karasyuk.

full news story can be found on cbc news.

the post dr. alla reznik speaks about improved breast cancer detection on cbc news thunder bay appeared first on rezniklab and posted by pavlo karasyuk.

the post congratulations: oleksii semeniuk completed phd appeared first on rezniklab and posted by pavlo karasyuk.

abstract

lead oxide (pbo) is one of the most promising materials for application in direct conversion medical imaging x-ray detectors. despite its high potential, conventional polycrystalline pbo layers deposited with the basic thermal evaporation method are not yet mature for practical use in x-ray imaging; indeed, they are highly porous, unstable at ambient conditions, and substoichiometric. in order to combat the above issues with pbo, we advance the basic evaporation process with simultaneous energetic ion bombardment of the growing film. we show that tuning the ion-assisted thermal deposition not only solves the structural problems of poly-pbo, but also enables the growth of a new noncrystalline polymorphic form of the material—amorphous pbo (a-pbo). in contrast to poly-pbo, novel a-pbo layers grown by ion-assisted thermal deposition are stable at ambient conditions. structural and morphological analysis confirms that a-pbo is stoichiometric and free of detectable voids, which suggests higher bulk x-ray stopping power than porous poly-pbo.

continue reading the article: https://link.springer.com/article/10.1007%2fs10853-017-0998-5

the post congratulations to oleksii semeniuk on publishing a paper in journal of materials science appeared first on rezniklab and posted by pavlo karasyuk.

“we launched radialis medical to commercialize our pem technology and to bring it to clinical trials at the thunder bay regional health sciences centre, which will help save lives and put thunder bay on the cutting edge of healthcare,” said dr. alla reznik, radialis’ chief scientific officer.  more information

dr. alla reznik won the faculty innovation award 2017.

entire research group congratulates dr. reznik!

the post congratulation to dr. alla reznik on winning the faculty innovation award appeared first on rezniklab and posted by pavlo karasyuk.

this graduate student research conference 2017 was held in 阿根廷vs墨西哥竞猜 agora during research and innovation week in march 2017. this conference was organised by the faculty of graduate studies. at this year’s conference, more than 20 posters were presented by the graduate 世界杯2022赛程表淘汰赛  from various departments of 阿根廷vs墨西哥竞猜 .

entire reznik research group congratulates the participant and wishes him good luck!

the post congratulation to harutyun poladyan – winner of graduate poster competition at 阿根廷vs墨西哥竞猜 appeared first on rezniklab and posted by pavlo karasyuk.