{"title":"Thermal Bistability and Impact of Graphene Based Nanocomposite Defect Layer on a Nano Photonic Multiband Absorber","authors":"S. Imam, Khandakar Mohammad Ishtiak, Q. D. Khosru","doi":"10.1109/NMDC46933.2022.10052238","DOIUrl":"https://doi.org/10.1109/NMDC46933.2022.10052238","url":null,"abstract":"Nanophotonic multispectral absorbers and their enhanced optoelectronic performance have been studied in the research areas of photonics. The graphene-based quasi-photonic structures has amended the progress in this area. In this paper, the temperature tunable absorption was explored numerically using the proposed graphene-based phase change material (PCM) nanocomposite cavity in the photonic structure. This work observes higher multiband absorption in the infrared spectrum with thermal tuning and resonant frequency switchable with variation of composite material. The design procedure of cavities improves higher quality factor (Q) and Full-Width Half-Maximum (FWHM) compared to other literature with the inclusion of graphene as a defect. The temperature-dependent graphene-based nanocomposite cavity in the proposed structure varies absorption peaks with changes in defect layer thickness, chemical potential of the graphene layer, and angle of the incident light. The performance of the structure was also studied in terms of absorption behavior under oblique incidence, enhanced Q-factor and FWDM with blue shift resonant frequency under different polarizations are observed. These observations can be used for designing optical filters and narrowband optical absorbers.","PeriodicalId":155950,"journal":{"name":"2022 IEEE Nanotechnology Materials and Devices Conference (NMDC)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129250727","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":"An Etching-Free Method for Patterning Carbon Nanotube Films Enabled by Universal Wettability Modulation","authors":"Rui Qiu, Qinqi Ren, Qi Liu, Lei Lu, Min Zhang","doi":"10.1109/NMDC46933.2022.10052161","DOIUrl":"https://doi.org/10.1109/NMDC46933.2022.10052161","url":null,"abstract":"Non-destructive patterning of low-dimensional materials has always been a challenge. An etching-free patterning method for high-density carbon nanotube (CNT) network has been proposed based on a wettability modulation method. By adopting this method, we have realized high-resolution patterns of CNT films, which have been uniformly formed on the wetting regions with precise boundaries. A flexible thin-film transistor array has been further realized, which shows excellent electrical performance with on/off current ratio of 104 as well as subthreshold swing of 280 mV/dec. This high-efficiency, high-resolution, and etching-free patterning approach of CNTs holds great promise for numerous potential applications in flexible and stretchable electronics and provides general solution for the low-temperature low-dimension material fabrications of advanced electronics.","PeriodicalId":155950,"journal":{"name":"2022 IEEE Nanotechnology Materials and Devices Conference (NMDC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133986315","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":"A Laser-Coupled Dual Excitation Intravascular Ultrasound Transducer for Sonothrombolysis","authors":"Bohua Zhang, Huaiyu Wu, Xiaoning Jiang","doi":"10.1109/NMDC46933.2022.10052561","DOIUrl":"https://doi.org/10.1109/NMDC46933.2022.10052561","url":null,"abstract":"In this paper, we first introduced a miniaturized dual excitation laser-coupled intravascular ultrasound transducer with both a piezoelectric stack and a laser ultrasound transducer, which can generate a low-frequency (425 kHz) and high-frequency (7.2 MHz) dual excitation waves for thrombolysis. The prototype transducer can generate peak-negative pressure (PNP) of about 3.0 MPa with 100 Vpp input voltage and 8.5 MPa with 1mJ laser energy input, respectively. The in-vitro thrombolysis showed improved clot mass reduction (61.74 ± 3.15 %) and clot lysis speed (63.12 ± 4.35 mg/min) of dual-excitation ultrasound treatment compared to piezo or laser-generated ultrasound alone treatment.","PeriodicalId":155950,"journal":{"name":"2022 IEEE Nanotechnology Materials and Devices Conference (NMDC)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132643432","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":"Towards Outdoor Applications of Silver-Based Flexible Transparent Conductors","authors":"Hung-Shuo Chang, Y. Kao, Chiao-Chi Lin","doi":"10.1109/NMDC46933.2022.10052131","DOIUrl":"https://doi.org/10.1109/NMDC46933.2022.10052131","url":null,"abstract":"Silver-based flexible transparent conductors (FTC) such as silver nanowire (AgNW) networks and nano-structured oxide–metal–oxide (OMO) are promising alternative materials to the indium-tin oxide (ITO). However, the weatherability and long-term reliability of the silver-based nano-structures strongly rely on surface passivation and protective overcoating technologies. Research on the outdoor durability of Ag-based FTCs is essential to establishing guidelines for optimized encapsulation and design strategies. In this study, spin-coated AgNW networks on glass substrate and commercial OMO on polyethylene terephthalate (PET) substrate have been exposed outdoors inside and outside an under-glass exposure box. Results indicate that high moisture brought from violent rain damages AgNWs significantly. The OMO nano-structures on the other hand are robust against adverse weathering conditions, but the embrittlement of aged PET substrate provokes the propensity of surface cracking on the protective oxide layers of OMO. This study provides a scientific basis for developing Ag-based FTCs for outdoor applications.","PeriodicalId":155950,"journal":{"name":"2022 IEEE Nanotechnology Materials and Devices Conference (NMDC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124823882","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}