Aligarh Muslim University, India
Fabrication of an electrochemical sensor based on facile ternary nanocomposite for environmental safety
Adil Shafi Ganie, working as a research scholar under the guidance of Prof. Suhail Sabir at Environmental Research laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh-202002, India. He is working on nanomaterials from past few years and successfully used some of them as potential photocatalysts and nanosensors.
Development of highly sensitive and efficient chemical sensor is the key approach for safeguarding the health of environment and ecosystem. Herein, we report a facileacetone sensor based on Ag2S/NiO-ZnO modified GCE electrode with high sensitivity, lower-detection limit, reproducibility and good linearity. The ternary nanocomposite based acetone sensor was synthesized by homogenous precipitation method. The morphological, elemental, optical and structural characterizations were done by conventional methods such as Fourier-transform infraredspectroscopy (FTIR), Ultra violet visible spectroscopy (UV/Vis), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS) and powder X-ray diffraction (XRD). The electroanalytical and electrochemical behaviour of Ag2S/NiO-ZnO/GCE was investigated by cyclic voltammetry. The electrochemical results indicated that, due to grafting of Ag onto binary metal oxide, the nanocomposite sensor show enhanced electrocatalytic property, fast electron transfer towards sensing of acetone. The fabricated nanocomposite sensor showed high sensitivity (4.0764 μA mmol L-1 cm-2), and a lower detection limit (LOD: 0.06 mmol L-1) for detectionof acetone. Thus, the prepared sensor may be a promising for effective detection of hazardous and carcinogenic chemicals in ecological as well as environmental fields.
University of Oviedo, Spain
Nanoscale Sensor Networks in Internet of Vehicles
Dr. Nishu Gupta is specialized in the field of Nano Communication and Networking. He is a Postdoctoral Fellow at University of Oviedo, Asturias, Spain. His Masters specialization is in Nanoscience and Technology. He completed Ph.D. in Electronics and Communication Engineering from Motilal Nehru National Institute of Technology Allahabad, India in 2016.
Dr. Gupta is designated as Conference Chair at Global 2020 Congress on Networking and Communications and at 1st International Conference on Vehicular Systems, Networks and Technologies, March 2020, Athens, Greece.
Previously, Dr. Nishu has been Invited as Speaker at 20th World Summit on Nanotechnology and Expo (Nanotek-2018), Los Angeles, USA; Invited as Speaker at Conference on Wireless & Telecommunication at Lisbon, Portugal; designated as Session Co-chair in the 15th International Conference on Wireless Networks and Mobile Systems (WINSYS 2018), Porto, Portugal. Earlier, he has served as Publicity Co-chair for the 8th and 7th International Conference on Advanced Materials Research (ICAMR 2018 in Japan and ICAMR 2017 in Hong Kong respectively) and Program Co-chair for the 6th International Conference on Advanced Materials Research (ICAMR 2016), Torino, Italy, 2016.
Dr. Nishu serves as an active reviewer in various highly reputed Journals. He also serves as editorial member and committee member of various academic and professional bodies across the world.
Sensors play important role in wireless communication applications. These allow network of communicating devices to be assembled within the Internet of things, wireless sensor network, mobile/vehicular ad-hoc network and many more potential applications. To fabricate these sensors, many varieties of materials are used. These include eco-friendly materials, low-cost materials, recycleable materials, future generation materials etc. The research paradigm has now shifted towards newer classes of materials. These classes of sensor materials are playing dominant role in communication devices because of their flexibility to get easily fabricated, and by changing the composition of their elemental materials. Some of these materials are: piezoelectric materials, metamaterials, ultrahigh frequency (UHF) purpose integrated circuit (IC) materials, energy-efficient materials; special semiconductors, metals and alloys.
A thick remote system of nano-gadgets, i.e., a nanonetwork, could possibly achieve new and increasingly complex functionalities. A few inventive standards to empower nanonetworks have been proposed over the most recent couple of years. Nano-sensors and nano-actuators conveyed in the human body could empower inescapable and receptive nonstop in-vivo observing. Novel nanoscale electronic segments are being created, which can perform just straightforward assignments, for example, constrained processing, information putting away, detecting and incitation. The mix of a few of these nano-parts into a solitary element will empower the improvement of further developed machines, only a couple of cubic micrometers in size. The subsequent nanonetworks will empower numerous applications in the biomedical, electronic, mechanical and military communication fields, for example, propelled well-being checking and tranquilize conveyance frameworks, remote nanosensor systems for organic and concoction danger identification, or remote system on chip frameworks for ultrahigh-execution multi-center nano-registering structures. In addition, the coordination of nanonetworks with established remote systems and at last the Internet will empower a really digital physical framework, alluded to as the Internet of Nano-Sensors.
This paper deals with such novel materials whose incorporation would certainly enhance the future direction of research in wireless communication systems. Details on automotive cameras, lidars and radars as an extrapolation of current series sensors, with a reasonable explanation of technology and physical principles have been presented.
University of South Africa, South Africa
Synthesis, Functionalization, and characterization of Mesoporous silica nanoparticles for targeted Curcumin Delivery to Cancer Cells
In the fight against cancer, development of multifunctional drug carriers that can encapsulate, transport, and specifically release the drugs to cancer cells in an active and stimuli-responsive way is very important. In this study, mesoporous silica nanoparticles were successfully synthesized, functionalized with alginate and chitosan and bonded with folic acid. Curcumin loading, in-vitro drug release in phosphate buffered saline and acetate buffers, in vitro cytotoxicity assay, intracellular uptake and drug internalization by living cells were investigated. The as synthesized MSN particles were highly monodisperse with a hydrodynamic diameter of 639.9 nm. Layer-by-layer coating of MSN by polyelectrolytes and conjugation of folic acid were confirmed by TGA and the zeta potentials. High drug encapsulation efficiency and loading capacity of 53% and 2.3% were achieved at pH 5.5. In-vitro drug release confirmed absence of curcumin release at blood pH of 7.4 while an initial burst release was observed at acidic pH followed by a sustained curcumin release over 36 hours. MTT assay showed the biocompatibility of the drug carrier while confocal laser scanning microscopy confirmed the hyper uptake and internalization of the multifunctional drug carrier. Exposure of free curcumin, drug-loaded carrier with and without folic acid, to the surface of HeLa cells before and after folic acid blocking, showed the efficient folic acid receptor assisted drug internalization by the tumour cells. The investigation offered a route to fabrication of biocompatible, pH-responsive, tumour-specific drug carriers with sustained drug delivery. Further investigations of the in-vivo tumour efficacy of the developed carrier are underway.
Virostatic potential of peptide coated Iron oxide nanoparticles based Antiviral activity against H1N1 influenza A virus
Dr. Rishikesh Kumar has expertise diagnostic, drug delivery and nanomedicine research in infectious virus and parasite. He has devloped the nanopartcles based antiviral and antiparasitic compond which is under clinical trial stage. He has number of very good publications in reputed journal to support his research.
Influenza virus is a common human pathogenic agent that has caused serious respiratory illness and death over the past century and in recent year. Influenza virus-associated illnesses cause estimated 200,000–500,000 hospital admissions and hundreds of thousands of deaths annually [1,2]. A new strain of Influenza virus A H1N1, commonly referred to as “swine flu” was found in April 2009, H1N1 virus strain recently has been found to be closely related to the swine flu virus, but with a genetically quite different from the earlier known isolate. [3,4]. India confirmed its first case on 16 May 16 2009, when a man travelling from New York to Delhi found to be positive for the H1N1 Influenza virus in Hyderabad .Therefore we have developed glycine (peptide) coated iron oxide nanoparticles (IO-NPs) with particle size in the range of 10-15 nm against pandemic influenza strain A/H1N1/Eastern India/66/pdm09 (H1N1-pdm09). Cell viability and anti-influenza activity was measured by MTT assay, plaque inhibition and quantifying viral transcripts using quantitative real-time PCR with Iron oxide nanoparticles in a dose- and time-dependent manner. 50% cell viability (TD50) was observed at 4.25 pg?±?2pg of Iron oxide nanoparticles. The percentage of plaque inhibition relative to the infected, The IC50 (50% virus reduction) of H1N1-pdm09 strain (0.5 moi) in vitro in MA104 cells by the plate forming unit(pfu) method was observed at 01pg after 72 h. The Antiviral activity determined by change in viral RNA transcripts within 24 h of virus infection by RT-PCR, 08 fold reductions(Image) in virus found when treated with Iron oxide nanoparticles Thus; it opens a new avenue for use IO-NPs of against virus infections.
Optimization and modelling of some innovative kerf-free approaches in photovoltaics
In first generation solar cells, the obvious way to reduce the cost is through the reduction of silicon consumption. Indeed, the silicon material, which is used in excess, represents up to 50% of the total solar panel cost1. Due to wafer sawing process, 180µm-thick wafers are usually used for solar cell processing, when 50 µm would be enough to absorb most incident photons2. Moreover, this sawing process leads to kerf losses up to 50% in the slurry3. Many kerf-free (literally without any materials losses) approaches have been implemented with a main goal: production of ultra-thin substrates with very accurate thicknesses. These approaches inlude stress induced layer (SIL), exfoliation by porosity inducing weaker layer, smart-cut technique involving low energy hydrogen implantation and layer transfer to approriated substrates, free standing thin layers produced by high energy hydrogen implantion following by thermal treatment. Some very innovative approaches combine stress induced layer transfer with laser initiation in order to control layer thickness. Theoretical calculations predicted a maximum solar cell efficiency of 25% for optimized cells with thicknesses in the range 50-150 µm while Kray et al4 reported an efficiency higher than 21.5% for a 37 µm thin Si layer. It is worth noting that the Shockley–Queisser limit of a single silicon solar cell is about 32%. The strengths, the weaknesses as well as the prospects of these various approaches will be presented with a focus on the three very promising techniques involving hydrogen implantation. They include high energy (MeV) hydrogen implantation leading to the production of self-standing ultra-thin substrates, stress induced layer (SIL) transfer with various stressors, and the third approach combining low energy hydrogen implantation with stress inducing layer transfer in order to control the thickness of the detached layer. The first technique allows production of layers with thicknesses as low as 10µm with solar cell efficiencies of about 14% for 20- 50µm silicon thin layers. The predicted costs could be as low as $0.15/W for such atechnique.
The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement H2020-MSCA-RISE-2017-777968 (INFINITE-CELL)
Reginald B. Little
Stillman College, USA
Novel materials constructed from enriched isotopes of nonzero nuclear magnetic moments
Reginald B. Little joins Stillman College as an Associate Professor in the Department of Chemistry. Prior attending Stillman College, she was a Visiting Instructor at Emory University and Georgia Perimeter of Georgia State University. Prof. Little has held permanent positions at Howard University, Elizabeth City State University and Florida A&M University. He received his PhD in Chemistry from Georgia Institute of Technology and his MS in Chemical Engineering from the Louisiana State University. He has developed in 2000 new a new physicochemical effect of magnetic fields on chemical reactions by strong magnetism and many spins altering orbital and hybridizations known as Little Effect. His primary research interests are in the field of magnetism, chemical reaction dynamics and energetics. Specifically, he is interested in his new predictions of isotopic enrichment for causing disease and curing disease for novel chemistry and catalysis and explaining superconductivity and above room temperature superconductivity. In his free time, he practices jogging, music and explores the city for good vegetarian cuisine and instances of teaching.
A theory of coupled nuclear and electronic magnetic moments as proposed by the author in 2000 is presented. The theory introduces orbital angular moments as well as the prior spin angular momenta for momentarily reversibly, relativistically altering electronic angular momenta for causing novel transport, catalytic, chemical, biological and nuclear processes. Most elements have isotopes of zero nuclear magnetic moments (NMM). New applications of enriching elements with their isotopes of nonzero NMM (NZNMM) are presented for constructing materials of remarkable properties for extending range of materials design and engineering. The recent determination of isotopic enrichment of NZNMM for altered biochemistry for transformations of normal to cancer cells is presented. By this theory the recent observation of 25Mg, 43Ca, and 67Zn for selectively killing cancer cells is explained and modelled. In general by assisting uptakes of isotopes of NZNMM, RF is presented by the author to affect tissues of living materials. The recent novel chemical fixation of N2 to NH3 by 11B and 10B atoms in single layer network is given. The recent achievement of room temperature superconductivity within nano-silver pellets in nano-gold matrix is explained and modelled. A new cheaper superconductor composed of single layer 11B15N and 10B15N is predicted and presented by the author for technological applications. Moreover, a model is further developed by the author for accelerated motion and gravity to induce isotopic fractionation within enzymes of tissue materials of living organisms. On the basis of this model, the free fall in space can also accelerate uptake of 13C, 15N, and 17O within telomere of astronauts for shortening their telomeres.
Universidad Complutense de Madrid, Spain
Mechanical behavior of porous Ti2AlC and Ti3SiC2 MAX phases simulated by FEM
MAX phases are known to exhibit nonlinear elastic behavior under uniaxial compression tests. This unusual mechanical response is related to their layered nanolaminate structure. The mechanism for this performance is well explained by the formation, growth and annihilation of incipient kink bands (IKBs). These materials are usually known as kinking nonlinear elastic (KNE) solids. In this work the authors present the results of a numerical model which, once implemented into a commercial Finite Element Modelling (FEM) software, such as Abaqus/CAE, reproduces accurately the mechanical behavior of KNE solids. The numerical model was validated on Ti3SiC2 and Ti2AlC MAX phase foams tested under uniaxial compression. The foams were previously produced via powder metallurgy with the space holder method and the pore size and amount of porosity was characterized by X-ray tomography. The results of this model show a great potential to predict the effect of the foam architecture parameters on their mechanical response, allowing the design of foams with optimized properties for tailored applications.