Abstract：
:Detection of nitroaromatic explosives with high sensitivity and selectivity is extremely important for civilian and military safety. Here, we report the synthesis and multimodal sensing applications of an emissive alanine based dansyl tagged copolymer P(MMA-co-Dansyl-Ala-HEMA) (DCP), synthesized by RAFT copolymerization. The fluorescent co-polymer exhibited high sensitivity and selectivity towards conventional nitroaromatic explosives such as DNT, TNT and TNP in solution at lower range of µM level and also with saturated vapor of NACs. The quantum yield of the co-polymer was measured to be very high (Φf = 77%) which make it an ideal candidate for sensing in solution as well as in vapor phase. The fluorescence signal from DCP copolymer gets significantly quenched upon addition of aliquots of DNT, TNT, and TNP. The Stern-Volmer constant was calculated to be very high. The quenching mechanism was further established by fluorescence up-conversion, time-resolved fluorescence and steady state absorption spectroscopy. The energetics of sensing process was calculated by Density Functional Theory (DFT) studies. We also fabricate a thin film polymer sensor which was able to detect nitroaromatic vapors with high selectivity. This opens up the possibility of building a low-cost and light-weight nitroaromatic explosives sensor for field use.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Kumar V,Maiti B,Chini MK,De P,Satapathi Sdoi
10.1038/s41598-019-43836-wsubject
Has Abstractpub_date
2019-05-13 00:00:00pages
7269issue
1issn
2045-2322pii
10.1038/s41598-019-43836-wjournal_volume
9pub_type
杂志文章abstract：:A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper. ...
journal_title：Scientific reports
pub_type： 已发布勘误
doi：10.1038/s41598-018-24098-4
更新日期：2018-04-12 00:00:00
abstract：:Significant technical and optical advances are required for intraoperative optical coherence tomography (OCT) to be utilized during otological surgeries. Integrating OCT with surgical microscopy makes it possible to evaluate soft tissue in real-time and at a high resolution. Herein, we describe an augmented-reality, i...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-35563-5
更新日期：2018-11-27 00:00:00
abstract：:Unlike the constant nature of elastic coefficients of isotropic bulk materials, the Young's (E) and shear (μ) moduli of nano-structured (NS) gyroid metamaterials change with relative density (ρ), but at different rates depending on the cell size of the structure. These elastic behaviors displayed by E and μ cause cros...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-10978-8
更新日期：2017-09-05 00:00:00
abstract：:Rapid histopathological evaluation of fresh, unfixed human tissue using optical sectioning microscopy would have applications to intraoperative surgical margin assessment. Microscopy with ultraviolet surface excitation (MUSE) is a low-cost optical sectioning technique using ultraviolet illumination which limits fluore...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-22264-2
更新日期：2018-03-14 00:00:00
abstract：:We introduce a polarization-resolved terahertz time-domain spectrometer with a broadband (0.3-2.5 THz), rotatable THz polarization state, and which exhibits minimal change in the electric field amplitude and polarization state upon rotation. This was achieved by rotating an interdigitated photoconductive emitter, and ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-12568-0
更新日期：2017-09-26 00:00:00
abstract：:Adipose tissue inflammation is a central pathological element that regulates obesity-mediated insulin resistance and type II diabetes. Evidence demonstrates that extracellular signal-regulated kinase (ERK 1/2) activation (i.e. phosphorylation) links tumor necrosis factor α (TNFα) to pro-inflammatory gene expression in...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-12861-y
更新日期：2017-10-10 00:00:00
abstract：:Insects' exoskeleton, gut, hemocoel, and cells are colonized by various microorganisms that often play important roles in their host life. Moreover, insects are frequently infected by vertically transmitted symbionts that can manipulate their reproduction. The aims of this study were the characterization of bacterial ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-32747-x
更新日期：2018-09-26 00:00:00
abstract：:The inconsistent findings on the association between COMT (catecholamine-O-methyl-transferase) and suicidal behaviour gave reason to choose a clear phenotype description of suicidal behaviour and take childhood maltreatment as environmental factor into account. The aim of this candidate-gene-association study was to e...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-19040-z
更新日期：2018-01-12 00:00:00
abstract：:The exposure of aqueous solutions to atmospheric plasmas results in the generation of relatively long-lived secondary products such as hydrogen peroxide which are biologically active and have demonstrated anti-microbial and cytotoxic activity. The use of plasma-activated solutions in applications such as microbial dec...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep21464
更新日期：2016-02-24 00:00:00
abstract：:The bioactive plant diterpene oridonin displays important pharmacological activities and is widely used in traditional Chinese medicine; however, its molecular mechanism of action is still incompletely described. In vitro and in vivo data have demonstrated anti-tumor activity of oridonin and its ability to interfere w...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-35088-x
更新日期：2018-11-13 00:00:00
abstract：:Principal research on energy from thermonuclear fusion uses Deuterium-Tritium plasmas magnetically trapped in toroidal devices. As major scientific problem for an economic (i.e., really feasible) reactor, we must understand how to lead strongly heated plasmas to sustain a high fusion gain while large fraction of curre...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-27996-9
更新日期：2018-07-09 00:00:00
abstract：:We have developed a computational method that counts the frequencies of unique k-mers in FASTQ-formatted genome data and uses this information to infer the genotypes of known variants. FastGT can detect the variants in a 30x genome in less than 1 hour using ordinary low-cost server hardware. The overall concordance wi...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-02487-5
更新日期：2017-05-31 00:00:00
abstract：:Short-range interaction can give rise to particle pairing with a short-range correlation, which may be destroyed in the presence of an external field. We study the transition between correlated and uncorrelated particle states in the framework of one- dimensional Hubbard model driven by a field. We show that the long ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep27189
更新日期：2016-06-02 00:00:00
abstract：:Culturomics is a high-throughput culture approach that has dramatically contributed to the recent renewal of culture. While metagenomics enabled substantial advances in exploring the microbiota, culturomics significantly expanded our knowledge regarding the bacterial gut repertoire through the discovery and the descri...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-66738-8
更新日期：2020-06-15 00:00:00
abstract：:The ability of metasurfaces to manipulate light at the subwavelength scale offers unprecedented functionalities for passive and active lasing devices. However, applications of metasurfaces to optical devices are rare due to fabrication difficulties. Here, we present quantum dot light emitting diodes (QDLEDs) with a me...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-15254-3
更新日期：2017-11-07 00:00:00
abstract：:Hepatocarcinoma (HCC) is one of the deadliest cancers in the world and represents a significant disease burden. Better biomarkers are needed for early detection of HCC. Metabolomics was applied to urine samples obtained from HCC patients to discover noninvasive and reliable biomarkers for rapid diagnosis of HCC. Metab...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep19763
更新日期：2016-01-25 00:00:00
abstract：:Hypoxia is a recognized characteristic of tumors that influences efficacy of radiotherapy (RT). Photoacoustic imaging (PAI) is a relatively new imaging technique that exploits the optical characteristics of hemoglobin to provide information on tissue oxygenation. In the present study, PAI based measures of tumor oxyge...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep21237
更新日期：2016-02-17 00:00:00
abstract：:In this study, the improved Aesop's fable paradigm-a series of experiments originally used to test whether some animals understand the causality associated with water replacement-was used to explore the cognitive ability of Azure-winged magpies (Cyanopica cyanus). Experimental results on causal cue tasks showed that t...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-80452-5
更新日期：2021-01-12 00:00:00
abstract：:We present a novel, all-electric approach to record and to precisely control the activity of tens of individual presynaptic neurons. The method allows for parallel mapping of the efficacy of multiple synapses and of the resulting dynamics of postsynaptic neurons in a cortical culture. For the measurements, we combine ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-00981-4
更新日期：2017-04-20 00:00:00
abstract：:The SELEX (Systematic Evolution of Ligands by EXponential enrichment) method has been used successfully since 1990, but work is still required to obtain highly specific aptamers. Here, we present a novel approach called 'Competitive non-SELEX' (and termed as 'SELCOS' (Systematic Evolution of Ligands by COmpetitive Sel...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-019-43187-6
更新日期：2019-04-30 00:00:00
abstract：:Medicinal plants are considered as one of the ideal sources for cancer therapy due to their bioactive contents and low toxicity to humans. Vernonia genus is one of the common medicinal plants, which has wide spread usage in food and medicine. However, there are limited studies to explore its anticancer properties. In ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep23255
更新日期：2016-03-24 00:00:00
abstract：:Previous studies have indicated that memory training may help older people improve cognition. However, evidence regarding who will benefit from such memory trainings has not been fully discovered yet. Understanding the clinical and neural inter-individual differences for predicting cognitive improvement is important f...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-19390-2
更新日期：2018-01-18 00:00:00
abstract：:Obesity causes a wide range of systemic diseases and is associated with mood and anxiety disorders. It is also associated with dopaminergic reward system function. However, the relationships between microstructural properties of the dopaminergic system and body mass index (BMI) have not been investigated. In this stud...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-69438-5
更新日期：2020-07-28 00:00:00
abstract：:In wild animal conservation, knowing the age of an individual animal is extremely beneficial. However, estimating the age is difficult for many species. Recently, epigenetics-based methods of estimating age have been reported. These studies were predominantly on humans with few reports on other animals, especially wil...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-28318-9
更新日期：2018-07-03 00:00:00
abstract：:Relying on an exact time evolution scheme, we identify a novel transient energy transfer phenomenon in an exactly-solvable quantum microscopic model consisting of a three-level system coupled to two non-Markovian zero-temperature bosonic baths through two separable quantum channels. The dynamics of this model can be s...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep15332
更新日期：2015-10-19 00:00:00
abstract：:Micronutrients are essential for survival and growth for all the organisms including pathogens. In this manuscript, we report that zinc (Zn) chelator N,N,N',N'-tetrakis(2-pyridinylmethyl)-1,2-ethylenediamine (TPEN) affects growth and viability of intracellular pathogen Leishmania donovani (LD) by a concentration and t...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-10041-6
更新日期：2017-09-05 00:00:00
abstract：:Energy storage devices that provide high specific power without compromising on specific energy are highly desirable for many electric-powered applications. Here, we demonstrate that polymer organic radical gel materials support fast bulk-redox charge storage, commensurate to surface double layer ion exchange at carbo...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep22194
更新日期：2016-02-26 00:00:00
abstract：:Adult neurogenesis occurs in the dentate gyrus of the hippocampus during adulthood and contributes to sustaining the hippocampal formation. To investigate whether neurogenesis-related pathways are associated with hippocampal volume, we performed gene-set enrichment analysis using summary statistics from a large-scale ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-019-50507-3
更新日期：2019-10-10 00:00:00
abstract：:It well-known that mental training improves skill performance. Here, we evaluated skill acquisition and consolidation after physical or motor imagery practice, by means of an arm pointing task requiring speed-accuracy trade-off. In the main experiment, we showed a significant enhancement of skill after both practices ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-021-81994-y
更新日期：2021-01-27 00:00:00
abstract：:Pre-shared non-local entanglement dramatically simplifies and improves the performance of quantum error correction via entanglement-assisted quantum error-correcting codes (EAQECCs). However, even considering the noise in quantum communication only, the non-local sharing of a perfectly entangled pair is technically im...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep07203
更新日期：2014-11-26 00:00:00
