Nanoscience and Nanotechnology Commons^™

Nanonickel Catalyst Reinforced With Silicate For Methane Decomposition To Produce Hydrogen And Nanocarbon: Synthesis By Co-Precipitation Cum Modified Stöber Method, Upm Ashik, Wma Wan Daud

upm ashik

Co-precipitation cum modified Stöber method is a continuous process avoiding application of higher temperature treatment before supporting nanometal with SiO2, irrespective of pre-preparation methods. We have conducted the co-precipitation process without undertaking calcination under air in order to avoid even a partial particle agglomeration and hence maintained average particle size [similar]30 nm after enforcing with SiO2. This is the first report adopting such an unceasing preparation for preparing metal/silicate nanostructures. Furthermore, n-Ni/SiO2 nanostructured catalysts were used for thermocatalytic decomposition of methane to produce hydrogen and carbon nanotubes. The catalyst was found to be very stable and the methane transformation activity …

Is There A Relationship Between Research Sponsorship And Publication Impact? An Analysis Of Funding Acknowledgments In Nanotechnology Papers, Jue Wang, Philip Shapira

Philip Shapira

This study analyzes funding acknowledgments in scientific papers to investigate relationships between research sponsorship and publication impacts. We identify acknowledgments to research sponsors for nanotechnology papers published in the Web of Science during a one-year sample period. We examine the citations accrued by these papers and the journal impact factors of their publication titles. The results show that publications from grant sponsored research exhibit higher impacts in terms of both journal ranking and citation counts than research that is not grant sponsored. We discuss the method and models used, and the insights provided by this approach as well as it …

Social Science Contributions Compared In Synthetic Biology And Nanotechnology, Philip Shapira, Jan Youtie, Yin Li

Philip Shapira

With growing attention to societal issues and implications of synthetic biology, we investigate sources of social science publication knowledge in synthetic biology and probe what might be learned by comparison with earlier rounds of social science research in nanotechnology. “Social science” research is broadly defined to include publications in conventional social science as well as humanities, law, ethics, business, and policy fields. We examine the knowledge clusters underpinning social science publications in nanotechnology and synthetic biology using a methodology based on the analysis of cited references. Our analysis finds that social science research in synthetic biology already has traction and …

Nonlinear Vibration Analysis Of Nonlocal Nanowires, Hassan Askari

No abstract provided.

Criterion For An Oscillatory Charged Jet During The Bubble Spinning Process, Ji-Huan He, H.Y. Kong

Ji-Huan He

The oscillatory diameter of the charged jet during the bubble electrospinning results in beads on the obtained nanofibers. We demonstrate that the applied voltage and the initial flow rate of the jet are the crucial parameters that are necessary to control morphology of the nanofibers. We also find that there is a criterion for production of smooth nanofibers without beads. The theory developed in this paper can be extended to the classical electrospinning and the blown bubble-spinning.

Fractional Calculus For Nanoscale Flow And Heat Transfer, Hong-Yan Liu, Ji-Huan He, Zheng-Biao Li

Ji-Huan He

Purpose – Academic and industrial researches on nanoscale flows and heat transfers are an area of increasing global interest, where fascinating phenomena are always observed, e.g. admirable water or air permeation and remarkable thermal conductivity. The purpose of this paper is to reveal the phenomena by the fractional calculus. Design/methodology/approach – This paper begins with the continuum assumption in conventional theories, and then the fractional Gauss’ divergence theorems are used to derive fractional differential equations in fractal media. Fractional derivatives are introduced heuristically by the variational iteration method, and fractal derivatives are explained geometrically. Some effective analytical approaches to fractional …

Connecting Research On Social Issues In Nanotechnology: The Center For Nanotechnology In Society At Arizona State University, Jan Youtie, Philip Shapira

Philip Shapira

Central to the emergence of new research topics is the creation of a research network. This paper looks at the creation of a network of researchers of social issues in nanotechnology and the role of the Center for Nanotechnology in Society at Arizona State University (CNS-ASU) in the creation of this network. While there has been US investment in societal research on nanotechnology, a debate exists about the extent to which a research community has been created through these investments. This paper uses three approaches to examine the extent to which CNS-ASU is associated with the development of a research …

Structure And Properties Of Polypropylene-Nanoclay Composites, Raghavendra R. Hegde Dr

Raghavendra R Hegde Dr

The structure, morphology and mechanical properties of polypropylene-nanoclay composites with 1 to 15 wt.% nanoclay additives were investigated. Mixture of intercalated and exfoliated morphology was observed in nanocomposites. At higher weight percentage reinforcement (10–15 wt.%), up to 67 % improvement in tensile modulus is observed. At higher weight percentage, exclusion of clay additives at the boundary of spherulites was observed. This study illustrates that along with the thermodynamic driving force, spherulite formation also drives the ultimate morphology

Investigation Of The Morphology Of Polypropylene-Nanoclay Nanocomposites, Raghavendra R. Hegde Dr

Raghavendra R Hegde Dr

The morphology development in polypropylene − nanoclay composites with different weight percentages of nanoclay additives was studied using a combination of wide-angle X-ray diffraction, small-angle X-ray scattering (SAXS), polarized optical microscopy and transmission electron microscopy. SAXS studies showed an increase in long period with increase in additive weight percentage. Thermal analysis showed that even if the clay platelets are not completely exfoliated they can act as effective nucleating agents. Studies indicated that the ultimate morphology formation is influenced by both the thermodynamics of mixing and crystallization and spherulite formation. During spherulite growth, unenclosed clay platelets were excluded at the spherulite …

Cfp: Handbook Of Research On Technological Applications And Innovation For Economic Development, Deogratias Harorimana Mr

Dr Deogratias Harorimana

The innovation in the 21st century goes significantly beyond the high-tech picture driven by small or large industry clusters in a specific region-typically Silicon Valley and M4Corridor. The future of innovation will lie within knowledge management and seamless technological applications. These will be supported by planned funding strategies, possibly with clients as drivers of the innovation. This view seems to be supported by the UK government “Technology and Innovation Futures” (2011); the USA government (2011), study into which leading scholars concede that the future innovation and technological applications for economic growth will include products and processes, improvements in areas such …

Functions And Future Applications Of F1 Atpase As Nanobioengine - Powering The Nanoworld!, Sandip S. Magdum

Sandip S. Magdum

Recent nanotechnological revolution mandates astonishing imagination about future nanoworld. Nature has ability to create nanobiomolecules which can function in extraordinary way which can be used to produce nano hybrid systems. The opportunity to use such nanobiomolecules in combination of nanomechanical systems for development of novel nano hybrid systems for their various applications needs to explore in further nanotechnological development. F1 ATPase is a subunit of ATP synthase, which is one of the biomolecular structure works on the plasma membrane of the living cell. The reversible function of F1 ATPase gives a counterclockwise rotation of γ shaft by hydrolyzing ATP and …

Tem Analysis As A Tooll For Toxicology Assessment Of Occupational Exposure To Airborne Nanoparticles From Welding, João F. Gomes

João F Gomes

No abstract provided.

Notice On A Methodology For Characterizing Emissions Of Ultrafine Particles/Nanoparticles In Microenvironments, João F. Gomes

João F Gomes

No abstract provided.

Biodiesel Production From Waste Trying Oils Over Lime Catalysts, João F. Gomes

João F Gomes

No abstract provided.

The Impact Of Controlled Solvent Exposure On The Morphology, Structure And Function Of Bulk Heterojunction Solar Cells, Raghavendra R. Hegde Dr

Raghavendra R Hegde Dr

Films of poly(3-hexyl thiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) were controllably exposed to CS2 vapor in a column with a linear solvent vapor pressure gradient. Changes in the morphology of the P3HT:PCBM thin film were monitored and correlated to the ability of this thin film to act as the active layer in an organic solar cell. The results show that the crystallinity and crystal size of the P3HT increase initially with solvent vapor pressure and annealing time, but longer exposure to solvent decreases P3HT crystallinity and photovoltaic efficiency. Neutron reflectivity indicates that the PCBM segregates to the Si substrate …

Research Inequality In Nanomedicine, Thomas Woodson

Thomas Woodson

The 10-90 gap is an idea in the healthcare literature that less than 10%of all research funding goes to solving health problems that are 90%of the global disease burden. This paper examines whether there is inequality in nanotechnology healthcare research (nanomedicine). To understand the inequality in nanomedicine, I conducted a bibliometric review of Web of Science and PubMed databases. Overall there is not large inequality in nanomedicine research. The bibliometric analysis shows that most nanomedicine research is done in high income countries, but their research portfolios extend beyond rich world diseases like Alzheimer’s disease and diabetes to include research on …

How Can Pacific Island Economies Benefits From The Advent Of Ict’S – Review Of Best Practices In Education, Deogratias Harorimana Sr

Dr Deogratias Harorimana

This paper explored implementation and use of information and communication technologies in Fiji, in order to gain insight into recent government initiatives to introduce computers and other ICTs for the community of Fiji. The focus of this paper in that it provided the framework for an in-depth exploration of e-learning centers around the country and the benefits from the advent of ICT’s in e-learning community centers in Fiji. Areas concentrated on are outcome of ICT’s in formal education to students and community as a whole in areas of agriculture, health, environment and infrastructure etc. The research sought understanding from the …

Temperature Dependence Anomalous Dielectric Relaxation In Co Doped Zno Nanoparticles, Sajid Ali Ansari

Sajid Ali Ansari

We have reported temperature and frequency dependence of dielectric behaviour of nanocrystalline Zn1-xCoxO (x = 0.0, 0.01, 0.05 and 0.1) samples prepared by gel-combustion method. The synthesized samples were examined by x-ray diffraction (XRD), scanning electron microscopy (SEM) and LCR-meter, respectively. The XRD analysis reveals that ZnO has a hexagonal (wurtzite) crystal structure. The morphology and size of the nanoparticles (∼10-25 nm) were observed by SEM for 5% Co doped ZnO sample. In dielectric properties, complex permittivity (ɛ* = ɛ’-jɛ”), loss tangent (tanδ) and ac conductivity (σac) in the frequency range 75 kHz - 5 MHz were analyzed with temperature …

Technical Assistance, Knowledge Gatekeeping And Indigenous Knowledge: Re-Thinking The International Development Practice, Deogratias Harorimana Sr

Dr Deogratias Harorimana

This paper presents results from a multi-disciplinary conceptual analysis of development theory and practice. It reviews issues raised and proposes a shift in the epistemology of possession towards an epistemology of practice which is guided by the following aspects (1) The consideration of the learning culture of parties involved, (2) the ability and willingness for decontextualisation of the knowledge by the source and (3) the ability to embedded it by recipients (embededness ), (4) the importance that is attached to knowledge of the host country as reflected through (5) Similarity in culture, values, understanding of context and knowledge bases; (6) …

Mis Mock Questions (Why Mis In Corporate Turbulant Times), Deogratias Harorimana Sr

Dr Deogratias Harorimana

With corporate strategy becoming more and more dependent on speed,focus, innovation and strategy, what can MIS do? and what should be MIS role ? what is the relationship between Corporate Strategy KPI and MIS? These questions are answered in an MBA Management Information Systems at USP. This programme is delivered across the entire Pacific region through the Graduate School of Business. It is my privilege to post here few questions that students who attended one of the course in Nadi, at Tanoa International Hotel had to answer in one of the Quiz test.

The Miscibility And Depth Profile Of Pcbm In P3ht: Thermodynamic Information To Improve Organic Photovoltaics, Raghavendra R. Hegde Dr

Raghavendra R Hegde Dr

Recent work has shown that poly(3-hexylthiophene) (P3HT) and the surface-functionalized fullerene 1-(3-methyloxycarbonyl)propyl(1-phenyl[6,6])C(61) (PCBM) are much more miscible than originally thought, and the evidence of this miscibility requires a return to understanding the optimal morphology and structure of organic photovoltaic active layers. This manuscript describes the results of experiments that were designed to provide quantitative thermodynamic information on the miscibility, interdiffusion, and depth profile of P3HT : PCBM thin films that are formed by thermally annealing initial bilayers. It is found that the resultant thin films consist of a 'bulk' layer that is not influenced by the air or substrate surface. …

Economic Benefits Analysis Of Mining Industries In Png And Solomon Islands, Deogratias Harorimana Sr

Dr Deogratias Harorimana

This paper discusses mining and mineral operations in the two countries Papua New Guinea and Solomon Islands with regards to its contribution to the overall Gross domestic Product and the economic development of each country.

Our finding shows that mining is an excellent contributor to economic growth and development as in the case of Papua New Guinea.Tax revenue from PNG Mining industries contributions to the PNG fiscal basket remains strong and growing steadily. The mining and minerals tax revenue remains an important contributor to the government fiscal budget over the last 10 years. This has been a strong contributor to …

Understanding Economics Of The Pacific Island Nations: Issues And Cases, Deogratias Harorimana Sr

Dr Deogratias Harorimana

No abstract provided.

Job Creation In The Tuna Industry Of The Solomon Islands- A Tentative Strategic Analysis, Deogratias Harorimana Sr

Dr Deogratias Harorimana

The principal objective of this paper is to review the current Tuna Fisheries Policies in the Solomon Islands with a view to proposing strategies that will maximize Job creation while at the same time address the issues that currently exist in this sector. Although the Tuna Industry’s contribution to GDP is quite significant, the Solomon Island Government (SIG) gets little or close to nothing out of it in the form of revenue and Job creation with the majority of vessels being foreign owned and fishing license fees amongst the lowest in the Pacific. SOLTAI which is partly owned by the …

Review Of Solomon Islands’ Policies And Programs To Promote Private Sector Development And Small Business, Deogratias Harorimana Sr

Dr Deogratias Harorimana

Solomon Islands is a nation with vast resources with huge potential to excel economically if proper business atmosphere is provided for both private sector development and small and medium enterprises entrepreneurship. Conducive policies that, not only, a mere statement but is broken down to workable strategies with quantitative expected outcome with a strong mentoring mechanism is very important. Previous governments have continuously ignored the importance of having small business policies until lately when NCRA government came up with a set of policies that strategically addresses the significance of small and medium businesses. However, notwithstanding foreign investment is very important in …

Antimicrobial Activity Of Metal Oxide Nanoparticles Against Gram-Positive And Gram-Negative Bacteria: A Comparative Study, Mohammad Oves

Mohammad Oves

No abstract provided.

Insights Into The Power Law Relationships That Describe Mass Deposition Rates During Electrospinning, Jonathan J. Stanger, Nick Tucker, Simon Fullick, Mathieu Sellier, Mark P. Staiger

Jonathan J Stanger

This work explores how in electrospinning, mass deposition rate and electric current relate to applied voltage and electrode separation, factors give a range of applied electric fields. Mass deposition rate was measured by quantifying the rate of dry fibre deposited over time. Electric current was measured using a current feedback from the high voltage supply. The deposition of fibre was observed to occur at a constant rate for deposition times of up to 30 min. Both the mass deposition rate and electric current were found to vary with the applied voltage according to a power law. The relationship between the …

Using The Case Study Methodology In Teaching, Deogratias Harorimana Mr

Dr Deogratias Harorimana

This paper reviews the Why, How, to use the Case Study Methods in MBA teaching. The Presentation was prepared for and delivered as part of MBA students induction Programme in the Graduate School of Business.

Manipulation Of Electrospun Fibres In Flight: The Principle Of Superposition Of Electric Fields As A Control Method, Nurfaizey A. Hamid, Jonathan J. Stanger, Nick Tucker, Andrew Wallace, Mark P. Staiger

Jonathan J Stanger

This study investigates the magnitude of movement of the area of deposition of electrospun fibres in response to an applied auxiliary electric field. The auxiliary field is generated by two pairs of rod electrodes positioned adjacent and parallel to the line of flight of the spun fibre. The changes in shape of the deposition area and the degree of movement of the deposition area are quantified by optical scanning and image analysis. A linear response was observed between the magnitude of movement of the deposition area and voltage difference between the auxiliary and deposition electrodes. A squeezing effect which changed …

Effect Of Temperature On Surface Tension Of A Bubble And Hierarchical Ruptured Bubbles For Nanofiber Fabrication, Ji-Huan He

Ji-Huan He

Polymer bubbles can be used to fabrication of nanofibers using the bubble electrospinning. Temperature is one of the most effective parameters to control the spinning process. Suitable choice of inner and outer temperatures results in a minimal surface tension. A bubble under electronic field will be broken to form daughter bubble cascades, which can be used for nanofiber fabrication.