Pub Date : 2008-11-21DOI: 10.1109/MNRC.2008.4683379
A. Allagui, R. Wuthrich, E. Baranova
The unique optical, electronic, chemical and biological properties of metal nanoparticles have stimulated a large research activity into manufacturing methods of these nano-structures. An example of copper and nickel nanoparticle synthesis using electrochemical discharges in aqueous solutions is described. This low-cost template technique is a facile procedure to fabricate large quantities of metallic nano-sized particles. The resulting particles are characterized using an electrochemical method (cyclic voltammetry), Energy Dispersive X-ray Spectroscopy (EDS) analysis and Transmission Electron Microscopy (TEM).
{"title":"Copper and nickel nanoparticles: synthesis by electrochemical discharges","authors":"A. Allagui, R. Wuthrich, E. Baranova","doi":"10.1109/MNRC.2008.4683379","DOIUrl":"https://doi.org/10.1109/MNRC.2008.4683379","url":null,"abstract":"The unique optical, electronic, chemical and biological properties of metal nanoparticles have stimulated a large research activity into manufacturing methods of these nano-structures. An example of copper and nickel nanoparticle synthesis using electrochemical discharges in aqueous solutions is described. This low-cost template technique is a facile procedure to fabricate large quantities of metallic nano-sized particles. The resulting particles are characterized using an electrochemical method (cyclic voltammetry), Energy Dispersive X-ray Spectroscopy (EDS) analysis and Transmission Electron Microscopy (TEM).","PeriodicalId":247684,"journal":{"name":"2008 1st Microsystems and Nanoelectronics Research Conference","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122290573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-11-21DOI: 10.1109/MNRC.2008.4683402
T. Moore, Yongjun Lai
An electro-kinetic micropumping device has been designed, experimentally tested and analyzed theoretically using coupled computational fluid dynamic and electrostatic simulations. A microelectrode array uses the principle of AC electroosmosis; bulk fluid motion due to ions driven along microelectrode surfaces by forces stemming from tangential electric fields. Three submerged microelectrode wires, deposited to form a square spiral, had a three-phase traveling-wave applied AC signal to create a net flow. Microsphere tracers were used to measure the flow to determine pumping performance, and compare the fluid velocity and operating frequency to theoretical results. The device presented here demonstrated bi-directional pumping capabilities and the potential for use as both a particle collector and microfluidic pump.
{"title":"AC electroosmotic micropumping with a square spiral microelectrode array","authors":"T. Moore, Yongjun Lai","doi":"10.1109/MNRC.2008.4683402","DOIUrl":"https://doi.org/10.1109/MNRC.2008.4683402","url":null,"abstract":"An electro-kinetic micropumping device has been designed, experimentally tested and analyzed theoretically using coupled computational fluid dynamic and electrostatic simulations. A microelectrode array uses the principle of AC electroosmosis; bulk fluid motion due to ions driven along microelectrode surfaces by forces stemming from tangential electric fields. Three submerged microelectrode wires, deposited to form a square spiral, had a three-phase traveling-wave applied AC signal to create a net flow. Microsphere tracers were used to measure the flow to determine pumping performance, and compare the fluid velocity and operating frequency to theoretical results. The device presented here demonstrated bi-directional pumping capabilities and the potential for use as both a particle collector and microfluidic pump.","PeriodicalId":247684,"journal":{"name":"2008 1st Microsystems and Nanoelectronics Research Conference","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116604343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-11-21DOI: 10.1109/MNRC.2008.4683384
N. Safavian, D. Wu, K. Karim, A. Nathan
This paper presents a new hybrid current-programmed, current-output active pixel sensor (APS) suitable for real time x-ray imaging (fluoroscopy) and an off-panel CMOS readout circuit. The pixel circuit is designed using hydrogenated amorphous silicon (a-Si:H) thin film transistor (TFT) technology. Measurement based simulations show that the proposed pixel circuit can successfully compensate for characteristic variations (e.g. mobility and threshold voltage shift) in a-Si:H TFTs under prolonged gate voltage stress. Investigation of the APS transient response shows that the proposed circuit can fulfill the timing requirement of real time imaging. The readout circuit exploits correlated double sampling (CDS) technique to reduce the offset current, low frequency noise and fixed-pattern noise (FPN) on the array operation.
{"title":"Transient response of a 3-TFT hybrid active-passive pixel with correlated double sampling CMOS readout circuit for real-time medical X-ray imaging","authors":"N. Safavian, D. Wu, K. Karim, A. Nathan","doi":"10.1109/MNRC.2008.4683384","DOIUrl":"https://doi.org/10.1109/MNRC.2008.4683384","url":null,"abstract":"This paper presents a new hybrid current-programmed, current-output active pixel sensor (APS) suitable for real time x-ray imaging (fluoroscopy) and an off-panel CMOS readout circuit. The pixel circuit is designed using hydrogenated amorphous silicon (a-Si:H) thin film transistor (TFT) technology. Measurement based simulations show that the proposed pixel circuit can successfully compensate for characteristic variations (e.g. mobility and threshold voltage shift) in a-Si:H TFTs under prolonged gate voltage stress. Investigation of the APS transient response shows that the proposed circuit can fulfill the timing requirement of real time imaging. The readout circuit exploits correlated double sampling (CDS) technique to reduce the offset current, low frequency noise and fixed-pattern noise (FPN) on the array operation.","PeriodicalId":247684,"journal":{"name":"2008 1st Microsystems and Nanoelectronics Research Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131964647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-11-21DOI: 10.1109/MNRC.2008.4683385
A. Assadihaghi, H. Teimoori, R. Millett, A. Benhsaien, V. Tolstikhin, T. Hall, K. Hinzer
A broadband semiconductor optical amplifier (SOA) has been realized for the coarse WDM (CWDM) based systems operating over the O-band range. The SOA exhibits low polarization sensitivity, 23 dB gain and low noise based on the asymmetric multi-quantum well (AMQW) technique. Reflective SOAs (for modulating the upstream data in passive optical networks (PONs)) as well as in-line or booster amplifiers in CWDM systems are some of the applications of such a SOA.
{"title":"O-band semiconductor optical amplifier design for CWDM applications","authors":"A. Assadihaghi, H. Teimoori, R. Millett, A. Benhsaien, V. Tolstikhin, T. Hall, K. Hinzer","doi":"10.1109/MNRC.2008.4683385","DOIUrl":"https://doi.org/10.1109/MNRC.2008.4683385","url":null,"abstract":"A broadband semiconductor optical amplifier (SOA) has been realized for the coarse WDM (CWDM) based systems operating over the O-band range. The SOA exhibits low polarization sensitivity, 23 dB gain and low noise based on the asymmetric multi-quantum well (AMQW) technique. Reflective SOAs (for modulating the upstream data in passive optical networks (PONs)) as well as in-line or booster amplifiers in CWDM systems are some of the applications of such a SOA.","PeriodicalId":247684,"journal":{"name":"2008 1st Microsystems and Nanoelectronics Research Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132183692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-11-21DOI: 10.1109/MNRC.2008.4683378
R. Millett, K. Hinzer, T. Hall, H. Schriemer
Using laterally-coupled gratings in a DFB laser produces a more manufacturable design that can be easily monolithically integrated with a variety of other photonic devices. Higher order gratings further improve the manufacturing tolerances, at the cost of more optical loss compared to first-order gratings. We analyze the effect of duty cycle and cavity length on the threshold gain, Bragg detuning, normalized gain difference and optical field flatness of laterally-coupled DFB lasers with second-order gratings. A duty cycle of 0.7 and a cavity length of 300 mum was found to result in a high-performance laser design. The duty cycle can be used to trade off low threshold gain (for duty cycles ~0.8) and high mode discrimination (for duty cycles ~0.5) when designing these lasers.
{"title":"Optimal cavity lengths and duty cycles for second-order laterally-coupled distributed feedback lasers","authors":"R. Millett, K. Hinzer, T. Hall, H. Schriemer","doi":"10.1109/MNRC.2008.4683378","DOIUrl":"https://doi.org/10.1109/MNRC.2008.4683378","url":null,"abstract":"Using laterally-coupled gratings in a DFB laser produces a more manufacturable design that can be easily monolithically integrated with a variety of other photonic devices. Higher order gratings further improve the manufacturing tolerances, at the cost of more optical loss compared to first-order gratings. We analyze the effect of duty cycle and cavity length on the threshold gain, Bragg detuning, normalized gain difference and optical field flatness of laterally-coupled DFB lasers with second-order gratings. A duty cycle of 0.7 and a cavity length of 300 mum was found to result in a high-performance laser design. The duty cycle can be used to trade off low threshold gain (for duty cycles ~0.8) and high mode discrimination (for duty cycles ~0.5) when designing these lasers.","PeriodicalId":247684,"journal":{"name":"2008 1st Microsystems and Nanoelectronics Research Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130345586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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