As the demand for flexible wearable electronic devices increases, the development of light, thin and flexible high-performance energy-storage devices to power them is a research priority. This review highlights the latest research advances in flexible wearable supercapacitors, covering functional classifications such as stretchability, permeability, self-healing and shapememory capabilities, as well as practical studies on energy harvesting capabilities.

Phytohormones (plant hormones) are a class of small-molecule organic compounds synthesized de novo in plants. Although phytohormones are present in trace amounts, they play a key role in regulating plant growth and development, and in response to external stresses. Therefore, the analysis and monitoring of phytohormones have become an important research topic in precision agriculture. Among the various detection methods, electrochemical analysis is favored because of its simplicity, rapidity, high sensitivity, and in-situ monitoring. Graphene and graphene-like carbon materials have abundant sources, exhibiting large specific surface area, and excellent physicochemical properties. Thus, they have been widely used in the preparation of electrochemical biosensors for phytohormone detection. In this paper, the research advances of electrochemical sensors based on graphene and graphene-like carbon materials for phytohormone detection have been reviewed. The properties of graphene and graphene-like carbon materials are first introduced. Then, the research advances of electrochemical biosensors (including conventional electrochemical sensors, photoelectrochemical sensors, and electrochemiluminescence sensors) based on graphene and graphene-like carbon materials for phytohormone detection is summarized, with emphasis on their sensing strategies and the roles of graphene and graphene-like carbon materials in them. Finally, the development of electrochemical sensors based on graphene and graphene-like carbon materials for phytohormone detection is prospected.

The present study choose to conduct consumer behavioral research in Metaverse situation, explores factors that influence consumer shopping enjoyment and purchase intention from product, service and technology perceptive. The research team gathered the primary data through questionnaire subjecting to Chinese consumers (n=300) who know about TaoBao future city which themes on virtual buying in Metaverse. In addition, structural equation modeling is employed to examine the hypothesized relationship among the variables. The result shows that all the driving factors positive effects consumer shopping enjoyment and then influence purchase intention positively. The finding is significantly fundamental to establish theoretical framework future about virtual shopping in Metaverse, and help marketers realize how to set virtual stores in Metaverse to enhance consumer shopping experience so that they could improve consumer purchase intention in the context.

How to effectively deal with the polluted water by the pollutant of organic dyes is the world problem. It is of great significance if the organic dyes in the polluted water can be directly turned into the useful materials through a facile approach. Herein, the water which contains the common organic dye, Reactive red 2 (RR2), has been chosen to be the model to synthesize graphene quantum dots (GQDs) by a facile route. The comprehensive characterizations, including TEM (HRTEM), XPS, Raman, PL and UV–Vis. spectra, have been performed to confirm the structures and explore the properties of the synthesized GQDs. Meanwhile, the excellent PL properties and low biotoxicity of the GQDs confer them with the potential applications in the biological fields. When the GQDs are excited by the wavelength of 360 nm, the maximum emission is achieved at 428 nm. It is well demonstrated that the synthesized GQDs are able to detect the Al3+ which causes multiple diseases, such as Parkinson, Alzheimer, kidney disease, and even cancer. The detection range is from 90 to 800 μM, which is different from the reported kinds of the literature. Therefore, this work not only provides an economical and environmental route on solving the universal problem from organic dyes, but also facilitates to advancing the synthesis and application of GQDs.

A composite photocatalyst of zinc oxide (ZnO) nanoparticles decorated with different content of reduced graphene oxide (rGO) was prepared via a simple and facile one-step method in this paper. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectra, and UV–Vis diffuse reflection spectroscopy (UV–Vis DRS) were used to characterize the crystal structure, morphology and optical properties of the rGO–ZnO composite photocatalyst. The photocatalytic properties of the composites were investigated using methyl orange (MO), a typical orange compound, as a test pollutant. The results showed that rGO–ZnO composites displayed significantly enhanced photocatalytic activity in MO degradation than pure ZnO, and the pseudo-first-order kinetic constant on the optimal rGO–ZnO composite was 14 times as great as that on pure ZnO. The enhanced photocatalytic ability of the rGO-ZnO composites was mainly benefited from the high specific surface area and high conductivity of rGO, which facilitated efficient charge separation in the rGO-ZnO nanocomposite.

Molybdenum disulfide ( MoS2) has been one of the most promising members of transition-metal dichalcogenides materials. Attributed to the excellent electrical performance and special physical properties, MoS2 has been broadly applied in semiconductor devices, such as field effect transistors (FETs). At present, the exploration of further improving the performance of MoS2- based FETs (such as increasing the carrier mobility and scaling) has encountered a bottleneck, and the application of high-κ gate dielectrics has become an effective approach to change this situation. Atomic layer deposition (ALD) enables high-quality integration of MoS2 and high-κ gate dielectrics at the atomic level. In this review, we summarize recent advances in the fabrication of two-dimensional MoS2 FETs using ALD high-κ materials as gate dielectrics. We first briefly discuss the research background of MoS2 FETs. Second, we expound the electrical and other essential properties of high-κ gate dielectrics, which are essential to the performance of MoS2 FETs. Finally, we focus on the advances in fabricating MoS2 FETs with ALD high-κ gate dielectrics on MoS2, as well as the optimized ALD processes. In addition, we also look forward to the development prospect of this field.

The hybridization of graphene with magnetic nanoparticles has endowed graphene with increasing interest as the adsorbent for wastewater treatment. However, its fabrication often involves a multi-stepped chemical synthesis process. In this work, we demonstrate a facile, one-step, and solvent-free approach to fabricate Fe3O4 nanoparticle-anchored Laser-Induced Graphene ( Fe3O4@LIG) as an efficient adsorbent by direct laser irradiation on a ferric acetylacetonate containing polybenzoxazine film. Raman and X-ray diffraction analysis confirm the graphene component in the adsorbent, and the morphology characterizations show that Fe3O4 nanoparticles are distributed uniformly on LIG with hierarchical meso- and macro-porous structures. Adsorption experiments indicate that Fe3O4@ LIG can adsorb methylene blue (MB) from aqueous solutions in a fast and effective manner, with a maximum adsorption capacity up to 350.9 mg/g. The adsorption kinetics and isotherms are also investigated, which are well-described by the pseudo-second-order model and Langmuir model, respectively. Additionally, Fe3O4@ LIG is also demonstrated with the efficient removal of a variety of organic solvents from water. The favorable adsorption behavior of Fe3O4@ LIG is attributed to its unique porous structure and the molecular interactions with adsorbates. On the other hand, Fe3O4@ LIG has high magnetic property, and therefore, it could be easily recovered from water and well regenerated for repeated use. With the efficient adsorption of organic pollutants, magnetic separability, and good

A porous-carbon material UiO-66-C was prepared from metal–organic frameworks UiO-66 by carbonization in inert gas atmosphere. Physicochemical properties of UiO-66-C materials were well characterized by Powder X-ray diffraction (PXRD), Scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FT-IR), Raman spectrometer, N2 adsorption/ desorption isotherms (BET), and the adsorption properties of the products were studied UiO-66-C has a high specific surface area up to 1974.17 m2/ g. Besides, the adsorption capacity of tetracycline could reach 678.19 mg/g, the adsorption processes agreed well with the pseudo-second-order kinetic model and Langmuir isotherm model.

The intrinsic negative Poisson’s ratio effect at the level of molecule in two-dimensional nanomaterials, especially in the perfect planar nanostructures with a single atom thickness, is really rare and has attracted a lot of research interests because of its unique mechanical properties in the nanoscale and extensive applications in mechanical nanodevices. In this work, a novel ideal planar carbon nanostructure (PCNS) framework with a single atom thickness composed by carbon and hydrogen atoms is proposed and studied by means of first-principles density functional calculation. The results showed that the PCNS is, simultaneously, of excellent thermodynamic, molecular dynamic and mechanical stabilities. In addition, the electronic structure, mechanical characters, and optical-electronic characteristics of PCNS are also explored. Excitedly, it is found that the PCNS has a significant negative Poisson’s ratio effect in plane, and the maximum value of Poisson’s ratio is as high as − 2.094. Meanwhile, the material has a wide range of elastic mechanics. Moreover, the PCNS presents an ideal UV absorption performance. It is hoped that this work could be a useful structural design strategy for the development of the ideal 2D carbon-based nanomechanical devices with the intrinsic negative Poisson’s ratio effect and other electronic functions.

Product labels are one way for advertisers to provide information to purchasers on product quality (Atkinson & Rosenthal, 2014). Label policies have been issued to promote information disclosure on food products in some developed countries. Recent years have also seen increasing attempts to promote healthy eating in emerging markets. In China, nutrition labels became mandatory under the nutrition labeling acts. The laws require nutrition information to be presented at the point of purchase as well as in establishments where food is prepared or consumed. Additionally, similar actions were taken by India (India Ministry of Health and Family Welfare, 2011), Mercosur members and in South Africa (Brazilian Ministry of Health, 2012; Institute of Food Technologists [IFT], 2011).

Luxury companies are striving to improve their communication with customers while paying attention to online promotion and marketing activities. As companies interact with customers in luxury brand communities via various channels, they yield consumers higher value throughout the effective consumption process. In addition, this connection enhances customers’ understanding of the company, making it easier for companies to acquire empathy from customers. This study aims to analyze the value factors that affect luxury brand community members’ purchase intention and brand attitude. This study utilizes online survey results of four hundred prestige brand community users in China. The results reveal the positive effects of customer engagement on customer psychological empowerment and flow, the positive impacts of customer psychological empowerment and flow on community identity and brand attachment, the positive effects of community identity on purchase intentions, and the positive effects of brand attachment on purchase intentions and brand attitude. Furthermore, the results show that community types and fashion involvement partially moderate customer engagement. This study provides theoretical suggestions for relationship marketing in the luxury brand community environment. Last, this study presents practical implications that companies could utilize to create an emotional connection with their community members, resulting in an increase of customer support.

The New Vacuum Solar Telescope (NVST) is the largest solar telescope in China. When using CCDs for imaging, equal-thickness fringes caused by thin-film interference can occur. Such fringes reduce the quality of NVST data but cannot be removed using standard flat fielding. In this paper, a correction method based on multi-scale decomposition and adaptive partitioning is proposed. The original image is decomposed into several sub-scales by multi-scale decomposition. The region containing fringes is found and divided by an adaptive partitioning method. The interference fringes are then filtered by a frequency-domain Gaussian filter on every partitioned image. Our analysis shows that this method can effectively remove the interference fringes from a solar image while preserving useful information.

Product labels are one way for advertisers to provide information to purchasers on product quality (Atkinson & Rosenthal, 2014). Label policies have been issued to promote information disclosure on food products in some developed countries. Recent years have also seen increasing attempts to promote healthy eating in emerging markets. In China, nutrition labels became mandatory under the nutrition labeling acts. The laws require nutrition information to be presented at the point of purchase as well as in establishments where food is prepared or consumed. Additionally, similar actions were taken by India (India Ministry of Health and Family Welfare, 2011), Mercosur members and in South Africa (Brazilian Ministry of Health, 2012; Institute of Food Technologists [IFT], 2011). While nutritional labeling has received a lot of attention both in academia and from the press, some key gaps remain in the nutrition labeling literature. First, a great deal of marketing research has focused on consumer responses (e.g., Balasubramanian & Cole, 2002; Hieke & Taylor, 2012; Ippolito & Mathios, 1995; Parker & Lehmann, 2014; Shah, Bettman, Ubel, Keller, & Edell, 2014) and firm responses (e.g., Moorman 1998; Moorman, Du, & Mela, 2005; Moorman, Ferraro, & Huber, 2012) to nutrition labeling laws. Although stock market investors express greater interest in information about nutrition issues that can be integrated into financial analyses (Global Access to Nutrition Index [ATNI] Investor Statement, 2013), the issue of how standardized information requirements affect investors’ responses in financial markets has been understudied. As used here, standardized product-information disclosure refers to a requirement to present facts about firms’ offerings in a common format using uniform metrics (Moorman et al. 2012). Understanding the extent to which investors consider product information-disclosure polices when they make investment decisions is important because a company’s financial health is not only the ultimate measure for the success or failure of any strategic initiative (Luo & Bhattacharya, 2009), but also one of the most important measures of public policy effectiveness (Joshi & Hanssens, 2010; Srinivasan & Hanssens, 2009; Schwert, 1981). Moreover, urgent concerns have spilled over from the product market to the financial market (Chen, Ganesan, & Liu, 2009) due to the enormous economic costs and damage to firms’ reputations in product-harm crises (e. g., melamine contamination in several Chinese brands of infant milk powder) (Ngo, 2014). Another gap in the literature is how nutritional-labeling requirements affect emerging markets. In contrast to the situation in long-developed countries, emerging markets are subject to different pressures for food marketers and thus a distinctive environment surrounds the regulation of food product labeling. In China, food safety and quality is considered an urgent concern, and the issue has forced regulators and companies to take action (Yan, 2008). Unlike mature stock markets, the majority of investors in China are individuals (Chen, Li, & Shi, 2010). The Chinese markets are under-regulated and deficient in gathering and disseminating information to private or public organizations, and it is difficult for listed firms with insufficient records to form reputations (Singh et al., 2005). As a result, information asymmetry is accentuated and imperfect signals released from firms highly impact investor decisions. Thus, examining the effectiveness of labeling requirements in developing economies is important as is comparing these results to those found in more developed countries. Despite the importance of the issue in emerging markets, empirical work for investigating investor response to the public policy of nutrition labeling (Ghani, & Childs, 1999) or firms’ nutrition claim strategies (Cao & Yan, 2016) has been restricted in developed markets (e.g., the U.S.). Little is understood the changes in corporate financial performance because of regulations requiring product information disclosure in emerging markets. As a result of the pressures for consumer protection and regulation, it is increasingly important for policy makers to be able to understand the financial consequences of such regulation because of information disclosure policies (Moorman et al., 2005). Thus, an additional contribution of this study is to help better inform the policy debate in emerging markets. To fill these research gaps, we investigated the influence of the influx of standardized product information on the stock market. Specifically, we conducted an event study to examine the effect on firms’ stock values from the issuance of the food nutrition label acts (FNLAs) in China, a fast-growing emerging market. The acts require food manufacturers to provide standardized nutritional information on pre-packaged food labels. This study contributes to the marketing literature on the financial impact of regulation in emerging markets. In China, on the day the FNLA was issued, they were associated with positive abnormal stock returns of related firms. This result is contrary to the study by Ghani and Childs (1999) that reported that the NLEA passage showed a negative impact on firms’ stock prices. Second, the financial value from the issuance of regulations was strengthened by three marketing leverages—advertising, donations, and R&D. Finally, although Moorman et al. argued that the NLEA increased the number of small-share firms exiting the U.S. market (Moorman et al., 2005), we found that in the short term, large firms benefited less than small firms from product information disclosure in China’s stock market. These findings provide empirical evidence that regulatory controls create changes in shareholder wealth and provide an assessment of the financial market’s perceptions regarding the role of mandatory product- information disclosure in future corporate growth. In addition, evidence of the effects of regulatory changes on wealth is of significant value to policymakers and market participants as they evaluate the benefits and costs of information disclosure in emerging markets.

Since more and more consumers rely on online consumer reviews in their purchase decision making, we have observed the emergence of empirical studies on online reviews in different contexts. Such studies look at various dimensions surrounding online reviews; nevertheless, none of them actually gives a more comprehensive picture as to the rating differences across online rating platforms and/or across time, let alone explains such differences. This study aims to address these understudied but managerially relevant issues. In our empirical study, we focus on hotel ratings across platforms and across time (i.e., across identified change point in time), and explain such differences by review text associating with the ratings. We investigated San Francisco hotels that were rated on both Tripadvisor and Expedia, and utilized the General Inquirer dictionary to identify the categories of words in a review. Regressions analyses were then conducted for the explanation of rating differences. We found that rating differences, in both the cross-platform and the longitudinal cases, are substantially associated with the number of words (in a negative relationship). Furthermore, word tags identified from the review text associated with ratings also explain the rating differences. To conclude, the research reveals that for a specific service provider, online ratings may vary significantly in both the cross-platform and the longitudinal senses. It demonstrates that adopting a systematic approach and utilizing an established semantic dictionary, information extracted from review text can substantially explain such differences.

Carnation (Dianthus caryophyllus L.) ‘Purple Beauty’ at micropropagation stage 3 was cultured under two levels each of medium sucrose concentration (0 and 30 g·L-1), photosynthetic photon flux density (50 and 200 μmol·m-2·s-1 PPFD), and CO2 concentration (350 and 1,000 μmol·mol-1), in a factorial experimental design, consisting of all eight possible treatment combinations. Shoot tip explants, obtained from in vitro-grown plantlets, were cultured on 50 mL agar-solidified Murashige and Skoog medium per container. Each culture container was sealed with a rigid lid vented by a high-efficiency particulate air filter attached to a 10 mm diameter hole made in the lid center, with an estimated number of 2.8 air exchanges per hour. All cultures were maintained for four weeks at 24°C/22°C (day/night) temperatures, 70%–80% relative humidity, and a 16 h/8 h (day/night) photoperiod was provided by white light-emitting diodes. The treatment combining high light intensity (200 μmol·m-2·s-1), high CO2 concentration (1,000 μmol·mol-1), and without supplementation of sucrose to the medium (i.e., photo-autotrophic conditions) resulted in better plantlet growth and development, with higher values being observed in terms of total fresh weight, tissue water content, leaf length, leaf width, and total chlorophyll content than in plantlets grown under the other treatments.

With the rapid development of the global economy, transport safety and security have become the key issues in maritime transportation all over the world. In practical applications, the Automatic Identification System (AIS)-based measurement of similarities between different vessel trajectories plays an important role in improving maritime transportation, e.g., maritime navigation, maritime supervision and management. However, the received AIS datasets are usually composed of a large amount of redundant information which could significantly increase the computational complexity. To deal with this problem, a Douglas-Peucker (DP)-based calculation method is introduced in this paper to accurately compress the spatio-temporal AIS trajectories while preserving the main geometrical structures. Based on the compressed trajectories, it is able to accelerate the Dynamic Time Warping (DTW) algorithm for the measurement of similarities between different vessel trajectories. In particular, the combination of DP and DTW has the capacity of significantly reducing the computational cost and guaranteeing the accuracy of similarity measures. The experimental results have demonstrated the superior performance of the proposed method in terms of computational cost and accuracy of similarity measures.

본 연구는 수박 접목묘의 활착에 미치는 상대습도의 영향을 알아보고자 수행하였다. 2품종(‘스피드’, ‘삼복꿀’)의 수박(Citrullus vulgaris Schrad.)을 ‘RS-동장군’ 박 대목(Lagenaria siceraria Stanld.)에 접목하고, 접목묘는 주간 25oC/야간 18oC, 광주기는 1일 16시간 기준으로 몰리어다이어그램을 따라 3수준의 상대습도, 95-96%[1.1-0.8(주간) 또는 0.8-0.6(야간) g·m-3수분부족분(VPD)], 97-98%[0.7-0.4(주간) 또는 0.5-0.3(야간) g·m-3 VPD], 또는 99-100%[0.3-0.0(주간) 또는 0.2-0.0(야간) g·m-3 VPD]로 유지하였다. 상대습도 처리 중 97-98% 처리는 대목과 ‘스피드’ 접수의 생체중과 초장을 가장 크게 증가시키며 접목 2일 후에 접합부의 연결을 향상시켰다. 그러나 ‘삼복꿀’의 경우 상대습도 99-100% 처리에서 경경과 초장이 증가하였다. 또한 상대습도 95-96%와 97-98% 처리에서 재배한 2 품종 모두 과산화수소가 덜 발생하고 산화적 스트레스의 지표인 항산화 효소의 활성이 덜 나타났다. 따라서 이 연구의 결과는 수박묘의 접목활착에 가장 적절한 상대습도는 97-98%였다.