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[en] The purpose of the study was to examine the effect of activity-based nanoscience and nanotechnology education (ABNNE) on pre-service science teachers’ (PST’) conceptual understanding of nanoscience and nanotechnology. Within this context, the study was conducted according to mixed methods research with the use of both quantitative and qualitative methods. The participants were 32 PST who were determined by using criterion sampling that is one of the purposive sampling methods. ABNNE was carried out during 7 weeks as 2 h per week in special issues at physics course. Design and implementation of ABNNE were based on “Big Ideas” which was found in literature and provided guidance for teaching nanoscience and nanotechnology. All activities implemented during ABNNE were selected from literature. “Nanoscience and Nanotechnology Concept Test (NN-CT)” and “Activity-Based Nanoscience and Nanotechnology Education Assessment Form (ABNNE-AF)” were used as data collection tools in research. Findings obtained with data collection tools were discussed with coverage of literature. The findings revealed that PST conceptual understanding developed following ABNNE. Various suggestions for increasing PST conceptual understanding of nanoscience and nanotechnology were presented according to the results of the study.
[en] Modern day microprocessor has increased remarkably in computational capacity which in turn has resulted in generation of higher heat fluxes. Air based conventional heat extraction systems are bungling to eradicate the aforesaid heat fluxes as the need of information technology and high computational facility is skyrocketing. In this present study, numerical simulation is carried out to analyze and compare the thermal performance of a heat pipe combined with forced convection heat transfer mechanism utilizing nanofluids in a mini channel heat sink for application in CPU cooling. Two phase heat transfer phenomenon employed in heat pipe can accomplish extreme heat removal rate. Temperature gradient along with thermal resistance between the coolant and mini channel heated wall is significantly reduced due to the application of nanofluids. Convective heat transfer coefficient at the condenser end of the heat pipe is noticeably improved with application of nanoparticles into distilled water. (author)
[en] Here, we report quantitative measurements of nanoscale permittivity and conductivity using tuning-fork (TF) based microwave impedance microscopy (MIM). The system is operated under the driving amplitude modulation mode, which ensures satisfactory feedback stability on samples with rough surfaces. The demodulated MIM signals on a series of bulk dielectrics are in good agreement with results simulated by finite-element analysis. Using the TF-MIM, we have visualized the evolution of nanoscale conductance on back-gated MoS2 field effect transistors, and the results are consistent with the transport data. Our work suggests that quantitative analysis of mesoscopic electrical properties can be achieved by near-field microwave imaging with small distance modulation.
[en] Incorporation of fulvic acid (FA) into the framework of hydroxyapatite particle to synthesis NHAP functionalized with FA (NHAP-FA) as a new smart nanocomposite is achieved. Some analytical methods such as EDX, FTIR, XRD, and TEM defined it. Preliminary study on the possible radiolabeling of NHAP-FA with 141,143Ce, 152,154Eu, 159,161Gd as represented radio-lanthanides that are gaining more attention in the last decades is carried out. The obtained results were revealed that a significant sorption affinity of radio-lanthanides (∼98%). Application on the environmental remediation towards the removal of some radionuclides (152,154Eu, 60Co, 99Mo, 63Ni and 137Cs) has been evaluated. (author)
[en] The International Conference on Nanoscience and Technology, China 2013 (ChinaNANO 2013) was held September 5–7, 2013 in Beijing, China. In this volume of Chinese Physics B, some selected papers delivered at the conference are published. (special topic — international conference on nanoscience and technology, china 2013)
[en] Various aspects of the structure formation and dynamics of animate and inanimate matter on the nanoscale is a highly interdisciplinary field of rapidly emerging research interest by both experimentalists and theorists. The International Conference on Dynamics of Systems on the Nanoscale (DySoN) is the premier forum to present cutting-edge research in this field. It was established in 2010 and the most recent conference was held in Bad Ems, Germany in October of 2016. This Topical Issue presents original research results from some of the participants, who attended this conference.
[en] As nanostructures with well-controlled dimension, composition, and crystallinity are expected to be a new class of intriguing system for investigating structure-property relations, this review article provides a comprehensive review of researches of these materials and related applications.
[en] The 13th COLA 2015 International Conference on Laser Ablation 2015, discuss the latest developments in laser ablation and in broader area of laser-induced modification of material properties. The purpose of this conference is to present a forum for the discussions and exchange of ideas in various areas of laser transformation of materials. This handbook includes titles and abstracts for 94 scientific and 175 poster presentations.
[en] Despite all predictions and promises, nanotechnology still seems to be more of an emerging science than a fully fledged revolution. More often than not, the patent system is blamed for this, supposedly tangling up nanotechnology in an impenetrable thicket of exclusionary rights instead of setting it free. Drawing on methods of complex network analysis, we provide empirical evidence suggesting that, at least in Europe, there is actually no patent thicket present in nanotechnology. Yet, the situation appears to be different in the USA.