{"title":"Metal-assisted chemical vertical etching of Si: Effect of catalyst morphology and oxidant concentration","authors":"B. Deepu, Sangeeth Kallat, A. Suresh, P. Savitha","doi":"10.1109/ICEMELEC.2014.7151184","DOIUrl":"https://doi.org/10.1109/ICEMELEC.2014.7151184","url":null,"abstract":"Deep vertical etching of Si using hydrogen peroxide as oxidant and Au as catalyst has been studied in terms of relative reactant concentrations and catalyst morphology. The concentrations of hydrogen peroxide and hydrofluoric acid are highly important and the ratio of the same can be varied to achieve isotropic to highly anisotropic vertical etching. Catalyst morphology and positioning of the substrate was also seen to affect vertical etch profiles, with high catalyst deposition rates and horizontal placement of the sample giving deep etching without defects.","PeriodicalId":186054,"journal":{"name":"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124671112","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}
{"title":"Single step fabrication of nano-structured superhydrophobic surfaces showing angle dependent colours","authors":"A. Tripathy, Ankur Goswami, P. Sen","doi":"10.1109/ICEMELEC.2014.7151208","DOIUrl":"https://doi.org/10.1109/ICEMELEC.2014.7151208","url":null,"abstract":"Superhydrophobic surfaces show extraordinary water-repellent properties with low drag for fluid flow due to reduced liquid-solid contact area. Due to high contact angle and low contact angle hysteresis these surfaces also show self-cleaning effect. In nature different plants and leaves, such as Lotus leaf and Rose petals show superhydrophobic behaviour due to wax coated micro/nano hierarchical structures on their surfaces. In this work, we report fabrication of superhydrophobic surfaces on silicon substrate using a one step process. This is a wafer scale large area fabrication technique for superhydrophobic surfaces. DRIE (Deep Reactive Ion Etching) technique was used to fabricate the nano structured extremely water repellent surfaces. Two different fabrication approaches have been followed in this work. In one approach the DRIE was carried out directly on silicon surface and in the second approach DRIE was done after spin coating alumina nanoparticles dissolved in ethanol on silicon surface. In both the processes, DRIE was done for a different number of etch cycles. The width of the nano-structures formed after DRIE process varies in the range of 300 nm to 500 nm. Contact angle has been measured and compared for the superhydrophobic surfaces fabricated using the above two approaches. Contact angle as high as 170°±1° was measured and less than 2° contact angle hysteresis was observed for water droplet. Also an angle dependent colour change phenomena, which was observed for the nano structured silicon substrates obtained using the second approach at different viewing angles is reported.","PeriodicalId":186054,"journal":{"name":"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127044799","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}
{"title":"Sensitivity analysis of tunable double microring resonator based intensity sensor","authors":"R. Prashanth, S. Selvaraja, M. Varma","doi":"10.1109/ICEMELEC.2014.7151199","DOIUrl":"https://doi.org/10.1109/ICEMELEC.2014.7151199","url":null,"abstract":"We propose an index tuned silicon photonic sensor capable of measuring refractive indices of liquid analytes. This sensor uses two microring resonators in cascaded configuration. Conventional double microring resonators display high sensitivity but limited range of detection. We show that the range of detection can be enhanced by more than an order of magnitude by using index tuning.","PeriodicalId":186054,"journal":{"name":"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121894301","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}
{"title":"Flexible graphite antennas for plastic electronics","authors":"M. Yogeesh, K. Parrish, D. Akinwande","doi":"10.1109/ICEMELEC.2014.7151166","DOIUrl":"https://doi.org/10.1109/ICEMELEC.2014.7151166","url":null,"abstract":"In this paper we report on the simulation, fabrication, and characterization of planar graphite antennas on flexible polyimide (kapton) substrate, operating in the ISM band. The patch antennas are constructed from pyrolytic graphite sheets adhered to the flexible substrate, and designed to resonate at 2.4 GHz. Simulation and measurements show that the antenna is relatively immune to changes in impedance match induced by bending, although the gain is adversely affected by several dB. For the first time, single-port convex bending measurement is performed on these graphite antennas, revealing only minimal change in resonant frequency as the antenna is bent, and little to no memory effect from the induced curvature. We conclude by showing the possibility of fabrication of an all carbon-based RF receiver.","PeriodicalId":186054,"journal":{"name":"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125724975","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}
S. Verma, S. Pandey, S. Mukherjee, Manoj K. Manna, Apurba K. Das
{"title":"Synthesis and characterization of Cd-doped ZnO Nanohybrids","authors":"S. Verma, S. Pandey, S. Mukherjee, Manoj K. Manna, Apurba K. Das","doi":"10.1109/ICEMELEC.2014.7151182","DOIUrl":"https://doi.org/10.1109/ICEMELEC.2014.7151182","url":null,"abstract":"Hybrid inorganic/organic Cd-doped ZnO nanostructures called CZO nanohybrids were electrochemically synthesized on Ga-doped ZnO/Si. The CZO nanohybrids comprise alternating layers of organic surfactant and CZO inorganic phase. These lamellar structured nanohybrids were found to be c-axis oriented, perpendicular to the substrate with good crystallinity. During photoluminescence measurement, a strong orange emission from CZO was observed. The nanohybrids were found to have band gap of 3.3 eV, indicating band gap shrinkage relative to ZnO. The nanohybrids hold great promise for the development of hybrid inorganic/organic light-emitting devices.","PeriodicalId":186054,"journal":{"name":"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)","volume":"178 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114160227","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}