High performing smart electrochromic device based on honeycomb nanostructured h-WO₃ thin films: hydrothermal assisted synthesis

Kondalkar, Vijay V.,Mali, Sawanta S.,Kharade, Rohini R.,Khot, Kishorkumar V.,Patil, Pallavi B.,Mane, Rahul M.,Choudhury, Sipra,Patil, Pramod S.,Hong, Chang K.,Kim, Jin H.,Bhosale, Popatrao N. The Royal Society of Chemistry 2015 Dalton Transactions Vol.44 No.6

<P>Herein, we report honeycomb nanostructured single crystalline hexagonal WO<SUB>3</SUB> (h-WO<SUB>3</SUB>) thin films in order to improve electrochromic performance. In the present investigation, honeycomb nanostructured WO<SUB>3</SUB> with different unit size and nanowire array with highly nanocrystalline frameworks have been synthesized <I>via</I> a hydrothermal technique. The influence of hydrothermal reaction time on the honeycomb unit cells, crystallite size, lithium ion diffusion coefficient and switching time for coloration/bleaching were studied systematically. The electrochromic study reveals that the honeycomb unit cell size has a significant impact on the electrochromic performance. Small unit cells in the honeycomb lead to large optical modulation and fast switching response. A large optical modulation in the visible spectral region (60.74% at <I>λ</I> = 630 nm) at a potential of −1.2 V with fast switching time (4.29 s for coloration and 3.38 s for bleaching) and high coloration efficiency (87.23 cm<SUP>2</SUP> C<SUP>−1</SUP>) is observed in the honeycomb WO<SUB>3</SUB> thin films with a unit cell diameter of 1.7 μm. The variation in color on reduction of WO<SUB>3</SUB> with applied potential has been plotted on an <I>xy</I>-chromaticity diagram and the color space coordinate shows the transition from a colorless to deep blue state.</P> <P>Graphic Abstract</P><P>Honeycomb nanostructured single crystalline hexagonal WO<SUB>3</SUB> (h-WO<SUB>3</SUB>) thin films in order to improve electrochromic performance. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4dt02953d'> </P>

Genome‑wide characterization of simple sequence repeats in Palmae genomes

Manee M. Manee,Badr M. Al‑Shomrani,Mohamed B. Al‑Fageeh 한국유전학회 2020 Genes & Genomics Vol.42 No.5

Background Microsatellites or simple sequence repeats (SSRs) have become the most significant DNA marker technology used in genetic research. The availability of complete draft genomes for a number of Palmae species has made it possible to perform genome-wide analysis of SSRs in these species. Palm trees are tropical and subtropical plants with agricultural and economic importance due to the nutritional value of their fruit cultivars. Objective This is the first comprehensive study examining and comparing microsatellites in completely-sequenced draft genomes of Palmae species. Methods We identified and compared perfect SSRs with 1–6 bp nucleotide motifs to characterize microsatellites in Palmae species using PERF v0.2.5. We analyzed their relative abundance, relative density, and GC content in five palm species: Phoenix dactylifera, Cocos nucifera, Calamus simplicifolius, Elaeis oleifera, and Elaeis guineensis. Results A total of 118241, 328189, 450753, 176608, and 70694 SSRs were identified, respectively. The six repeat types were not evenly distributed across the five genomes. Mono- and dinucleotide SSRs were the most abundant, and GC content was highest in tri- and hexanucleotide SSRs. Conclusion We envisage that this analysis would further substantiate more in-depth computational, biochemical, and molecular studies on the roles SSRs may play in the genome organization of the palm species. The current study contributes a detailed characterization of simple sequence repeats in palm genomes.

Mutations in the Histone Modifier PRDM6 Are Associated with Isolated Nonsyndromic Patent Ductus Arteriosus

Li, N.,Subrahmanyan, L.,Smith, E.,Yu, X.,Zaidi, S.,Choi, M.,Mane, S.,Nelson-Williams, C.,Behjati, M.,Kazemi, M.,Hashemi, M.,Fathzadeh, M.,Narayanan, A.,Tian, L.,Montazeri, F.,Mani, M.,Begleiter, M.L. University of Chicago Press [etc.] 2016 American journal of human genetics Vol.99 No.4

Fast response of sprayed vanadium pentoxide (V₂O₅) nanorods towards nitrogen dioxide (NO₂) gas detection

Mane, A.A.,Suryawanshi, M.P.,Kim, J.H.,Moholkar, A.V. Elsevier BV * North-Holland 2017 Applied Surface Science Vol.403 No.-

<P><B>Abstract</B></P> <P>The V<SUB>2</SUB>O<SUB>5</SUB> nanorods have been successfully spray deposited at optimized substrate temperature of 400°C onto the glass substrates using vanadium trichloride (VCl<SUB>3</SUB>) solution of different concentrations. The effect of solution concentration on the physicochemical and NO<SUB>2</SUB> gas sensing properties of sprayed V<SUB>2</SUB>O<SUB>5</SUB> nanorods is studied at different operating temperatures and gas concentrations. The XRD study reveals the formation of V<SUB>2</SUB>O<SUB>5</SUB> having an orthorhombic symmetry. The FE-SEM micrographs show the nanorods-like morphology of V<SUB>2</SUB>O<SUB>5</SUB>. The AFM micrographs exhibit a well covered granular surface topography. For direct allowed transition, the band gap energy values are found to be decreased from 2.45eV to 2.42eV. The nanorods deposited with 30mM solution concentration shows the maximum response of 24.2% for 100ppm NO<SUB>2</SUB> gas concentration at an operating temperature of 200°C with response and recovery times of 13s and 140s, respectively. Finally, the chemisorption mechanism of NO<SUB>2</SUB> gas on the V<SUB>2</SUB>O<SUB>5</SUB> nanorods is discussed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Effect of solution concentration on physicochemical properties of sprayed V<SUB>2</SUB>O<SUB>5</SUB> nanorods is studied. </LI> <LI> Good re­sponse and short re­sponse- re­covery times of V<SUB>2</SUB>O<SUB>5</SUB> nanorods towards NO<SUB>2</SUB> gas show it is potential material for fab­ri­ca­tion of NO<SUB>2</SUB> sensor. </LI> <LI> The chemisorption mechanism of NO<SUB>2</SUB> gas on the V<SUB>2</SUB>O<SUB>5</SUB> nanorods is discussed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Superior selectivity and enhanced response characteristics of palladium sensitized vanadium pentoxide nanorods for detection of nitrogen dioxide gas

Mane, A.A.,Suryawanshi, M.P.,Kim, J.H.,Moholkar, A.V. Academic Press 2017 Journal of Colloid and Interface Science Vol. No.

<P><B>Abstract</B></P> <P>Vanadium pentoxide (V<SUB>2</SUB>O<SUB>5</SUB>) nanorods have been deposited onto the glass substrates by spraying 75ml of 30mM vanadium trichloride (VCl<SUB>3</SUB>) solution at optimized substrate temperature of 400°C. The XRD study confirms the formation of orthorhombic crystal structure of V<SUB>2</SUB>O<SUB>5</SUB> nanorods. The FE-SEM micrograph shows the nanorods-like morphology of V<SUB>2</SUB>O<SUB>5</SUB>. The presence of palladium (Pd) in the Pd-sensitized V<SUB>2</SUB>O<SUB>5</SUB> nanorods is confirmed using EDAX study. The gas sensing measurements show that the Pd-sensitized V<SUB>2</SUB>O<SUB>5</SUB> sensing material is an outstanding candidate for nitrogen dioxide (NO<SUB>2</SUB>) gas detection. Obtained results demonstrate that the Pd-sensitized V<SUB>2</SUB>O<SUB>5</SUB> nanorods show the superior selectivity for NO<SUB>2</SUB> gas in comparison with other gases such as NH<SUB>3</SUB>, H<SUB>2</SUB>S, CO, CO<SUB>2</SUB> and SO<SUB>2</SUB> at an operating temperature of 200°C. It shows the 75% response for 100ppm NO<SUB>2</SUB> gas concentration with response and recovery times of 22s and 126s, respectively. Finally, the gas sensing mechanism based on chemisorption process is proposed to illustrate how Pd nanoparticles affect the gas sensing characteristics (response and response-recovery times).</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Magnetodielectric Effect in Microwave-Sintered Ba<SUB>0.8</SUB>Sr<SUB>0.2</SUB>TiO₃ and Co<SUB>0.9</SUB>Ni<SUB>0.1</SUB>Fe₂O₄ Composite

Sagar M. Mane,Sachin A. Pawar,Dipali S. Patil,Seong Hun Lee,Jae Cheol Shin 한국진공학회(ASCT) 2020 Applied Science and Convergence Technology Vol.29 No.2

Composites constructed by combining ferroelectric and ferromagnetic materials are of significant interest owing to their multifunctional features and potential applications in multifunctional devices. Herein, the magnetodielectric effect of a composite containing ferroelectric Ba0.8Sr0.2TiO₃ (BST) and ferrite Co0.9Ni0.1Fe₂O₄ (CNFO) phases is investigated. This ferroelectric and ferrite composite is synthesized using the co-precipitation method followed by microwave sintering. The tetragonal crystal structure of BST and cubic structure of CNFO are confirmed using X-ray diffraction. All composite samples are characterized using nanoparticle tracking analysis. The measurements of dielectric constant (room temperature) and loss tangent as a function of frequency show an increase in the dielectric constant with an increase in the CNFO phase. The highest value of magnetodielectric coefficient, -40.13 %, is observed for the 60BST-40CNFO composite at 100 Hz, which decreases with an increase in the applied frequency.

Ultra-rapid chemical synthesis of mesoporous Bi₂O₃ micro-sponge-balls for supercapattery applications

Shinde, Nanasaheb M.,Xia, Qi Xun,Yun, Je Moon,Shinde, Pritamkumar V.,Shaikh, Shoyebmohamad M.,Sahoo, Rakesh K.,Mathur, Sanjay,Mane, Rajaram S.,Kim, Kwang Ho Elsevier 2019 ELECTROCHIMICA ACTA Vol.296 No.-

<P><B>Abstract</B></P> <P>Polycrystalline and mesoporous bismuth oxide (Bi<SUB>2</SUB>O<SUB>3</SUB>) micro-sponge-balls of 4–7 μm in diameter comprising of 58–65 (±2) nm upright standing petals, separated by 100–700 (±50) nm crevices, are synthesized directly onto 3D Ni-foam at room-temperature (27 °C) using Tritonx-100 surfactant-mediated soft wet chemical method. After knowing the phase purity, surface area, pore-size distribution, micro-sponge-ball-type surface morphology, elemental analysis and binding energy confirmations of Bi<SUB>2</SUB>O<SUB>3</SUB>, a material with quasi-faradaic redox reactions responsible for supercapattery type behavior, are measured and explored. At a low scan rate, the specific capacitance of Bi<SUB>2</SUB>O<SUB>3</SUB> sponge-ball electrode, measured from 0.4 to 1.80 A g<SUP>−1</SUP> current density, decreases from 559 to 211 F g<SUP>−1</SUP> which is equivalent to a capacity from 155 to 58 mAh.g<SUP>−1</SUP>. An asymmetric supercapacitor (ASC) device assembly of Bi<SUB>2</SUB>O<SUB>3</SUB> sponge-ball electrode with graphite i.e. Bi<SUB>2</SUB>O<SUB>3</SUB>//graphite demonstrates excellent electrochemical properties with 8 Wh kg<SUP>−1</SUP> energy density at 2040 W kg<SUP>−1</SUP> power density, and about 80% cycling retention over 5000 redox cycle operations. A demonstration of LED with full-bright intensity during discharge process of the Bi<SUB>2</SUB>O<SUB>3</SUB>//graphite ASC device suggests its practical potentiality and industrial viability.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

A binder-free wet chemical synthesis approach to decorate nanoflowers of bismuth oxide on Ni-foam for fabricating laboratory scale potential pencil-type asymmetric supercapacitor device

Shinde, N. M.,Xia, Qi Xun,Yun, Je Moon,Singh, Saurabh,Mane, Rajaram S.,Kim, Kwang-Ho Royal Society of Chemistry 2017 Dalton Transactions Vol. No.

<▼1><P>The synthesis and asymmetric supercapacitor application of a bismuth oxide (Bi2O3) electrode consisting of arranged nano-platelets for evolving a flower-type surface appearance on nickel-foam (Bi2O3–Ni–F) are described.</P></▼1><▼2><P>The present study involves the synthesis of a bismuth oxide (Bi2O3) electrode consisting of an arranged nano-platelets for evolving a flower-type surface appearance on nickel-foam (Bi2O3–Ni–F) by a simple, inexpensive, binder-free and one-step chemical bath deposition (CBD) method, popularly known as a wet chemical method. The as-prepared Bi2O3 on Ni-foam, as an electrode material, demonstrates 557 F g<SUP>−1</SUP> specific capacitance (SC, at 1 mA cm<SUP>−2</SUP>), of which 85% is retained even after 2000 cycles. With specific power density of 500 kW kg<SUP>−1</SUP>, the Bi2O3–Ni–F electrode documents a specific energy density of 80 Wh kg<SUP>−1</SUP>. Furthermore, a portable asymmetric supercapacitor device, <I>i.e.</I> a pencil-type cell consisting of Bi2O3–Ni–F as an anode and graphite as a cathode in 6 M KOH aqueous electrolyte solution, confirms 11 Wh kg<SUP>−1</SUP> and 720 kW kg<SUP>−1</SUP> specific energy and specific power densities, respectively. An easy and a simple synthesis approach for manufacturing a portable laboratory scale pencil-type supercapacitor device is a major outcome of this study, which can also be applied for ternary and quaternary metal oxides for recording an enhanced performance. In addition, we presented a demonstration of lighting a light emitting diode (LED) using a home-made pencil-type supercapacitor device which, finally, has confirmed the scaling and technical potentiality of Bi2O3–Ni–F in energy storage devices.</P></▼2>

Electrochemical synthesis of flower like Mn-Co mixed metal oxides as electrode material for supercapacitor application

S.L. Kadam,S.M. Mane,P.M. Tirmali,S.B. Kulkarni 한국물리학회 2018 Current Applied Physics Vol.18 No.4

In the present work flower like Mn-Co mixed metal oxide electrode materials were successfully synthesized by simple, low cost electrodeposition method on stainless steel substrates. Different volume ratio of Mn-Co was used to attempt enhancement in the supercapacitive properties of electrode material. Structural, morphological and wettability properties of synthesized electrodes were carried out using XRD, RAMAN, FE-SEM and Contact Angle Measurement techniques. Electrochemical properties of electrodeposited Mn-Co mixed metal oxide at three different volume variation such as 50-50, 60-40 and 70- 30 electrodes were analyzed by using cyclic voltammetry, galvonostatic charge discharge and electrochemical impedance spectroscopy in 1M NaOH aqueous electrolyte. The Mn-Co:60-40 composition shows maximum specific capacitance which is 679 F/g at scan rate 5mV/sec. Charge discharge studies gives 95% columbic efficiency. Impedance spectroscopy reveals capacitive behavior and gives series resistance ~0.19 ohm and combined internal resistance ~0.89 ohm. The 80% retention of specific capacitance after the 1000 cycles. The synergistic effect of Mn-Co mixed metal oxide electrode having good conductivity, large surface area and improved charge transportation than individual electrode material leads to enhancing supercapacitor performance of electrode material for its practical application.

Dolichos biflorus Linn attenuate progression of renal damage in alloxan-induced diabetic rats

Chidrewar, G.U.,Mane, V.S.,Ghaisas, M.M.,Deshpande, A.D. Kyung Hee Oriental Medicine Research Center 2010 Oriental pharmacy and experimental medicine Vol.10 No.2

Dolichos biflorus Linn. (Fabaceae), commonly known as Horse gram is a medicinal plant, used in folk medicine for treating kidney stones and diabetes mellitus. The purpose of the present study was to investigate the effects of daily oral feeding of various doses of methanolic extract of Dolichos biflorus seeds (DB) for 42 days on blood glucose concentrations and kidney functions in Alloxan-diabetic rats. Plasma glucose levels, body weight, serum creatinine, and urinary albumin levels were monitored on $15^{th}$, $29^{th}$, $43^{rd}$ day. Renal hypertrophy was assessed as the ratio between the kidney weight and body weight of the rats. Plasma glucose concentrations in Alloxan-diabetic rats were significantly reduced by the administration of DB (350 mg/kg) and DB (700 mg/kg) on day 15 and onwards (P < 0.01). After 15 days of Alloxan administration urinary albumin levels (UAE) were over 5 fold higher in diabetic controls as compared to normal controls. Treatment with DB significantly prevented the rise in UAE levels from day 15 to 43 in comparison to diabetic controls (P < 0.01). Renal hypertrophy was significantly higher in diabetic controls as compared to non-diabetic controls. Treatments with DB (350 mg/kg) and DB (700 mg/kg) significantly prevented renal hypertrophy (P < 0.01) as compared to diabetic controls. DB (175 mg/kg) failed to modify renal hypertrophy. Thus the present study indicates that methanolic extract of Dolichos biflorus may be useful in management of hyperglycemia and kidney functions in Alloxan-diabetic rats.