Copper nanocatalysts are among the most promising candidates to drive electrochemical CO2 reduction reaction (CO2RR). However, stability of such catalysts during operation is sub-optimal, and improving this aspect catalyst behavior remains a challenge. Here, we synthesize well-defined tunable CuGa nanoparticles (NPs) demonstrate that alloying Cu with Ga considerably improves nanocatalysts. In particular, discover NPs containing 17 at. % preserve their CO2RR activity for at least 20 h while...

Galvanic replacement is a useful method for synthesizing architecturally complex multimetallic nanostructures from monometallic templates. The oxidation of templates by ions more noble metal well-studied; however, chemically heterogeneous offer than one type reaction site and potentially structurally materials. Yet, mechanistic studies with such are limited. Here, the reactivities Ag Pd in Janus-style AgPd dimers compared when capable oxidizing both metals introduced. This study reveals (1)...

The organization of natural materials into hierarchical structures accounts for the amazing properties many biological systems; however, translating structural motifs present in such to synthetic systems remains difficult. Inspired by how nature creates materials, this work demonstrates that kinetically controlled sequential seeded growth is a general bottom-up strategy prepare inorganic crystals with distinct compositions and nanostructured forms. Specifically, 85 different shape-controlled...

Colloidal atomic layer deposition of alumina shells onto perovskite nanocrystals and their subsequent self-assembly into uniform superlattices yields structures that are resistant against aging in an inert atmosphere for over 25 days.

Crystal growth theory predicts that heterogeneous nucleation will occur preferentially at defect sites, such as the vertices rather than faces of shape-controlled seeds. Platonic metal solids are generally assumed to have with nearly identical chemical potentials, and also faces, leading useful generality preserves symmetry original seeds in final product. Herein, we test limits this extreme low supersaturation, an effort expand methods available for inducing anisotropic overgrowth. We...

Many people find technology helpful, but seniors tend to use less than others. We apply constructs from the Theory of Planned Behavior investigate factors that drive in Taiwan's rapidly growing senior population. A structural equation model was built using attitudinal, behavioral, and variables collected. Affect, influence friends, comfort with were found affect intentions significantly. discuss implications limitations our findings, plus offer suggestions for future research.

In most developed and developing nations seniors lag behind the general population in information technology (IT) adoption use. This phenomenon has been labeled "gray divide" by various authors. study examines use of IT Taiwan. We conducted a survey to examine Taiwanese seniors' computer cell phone ownership as well attitudes behaviors that result from influence use, better understand extent which have will utilize IT. found Taiwan had generally high usage access computers phones; however,...

Technology, particularly information technology (IT), is changing rapidly and offers many advantages for users. IT has the potential to improve one's quality of life, but only if used. Research shown that, in most developed developing nations, senior use lags behind that other segments society. This "gray divide" a concern government, business, others. Concern about adoption been motivation numerous studies this study Chinese seniors. exploratory examines urban seniors' use, computers mobile...

Information and Communication Technologies (ICT) has been identified as one of the crucial factors that affect teaching effectiveness student learning worldwide. UNESCO, many international organizations, governments emphasized importance ICT try to incorporate into education systems. This study examined self-assessed computer competency in thirteen areas from two samples, e.g., United States Mexico. Reliability tests were conducted, rank analysis was done among them. By using factor...

Galvanic replacement of ordered intermetallic sacrificial templates results in architecturally complex products and highlights key processes the multimetallic templates.

AbstractAbstractPresently, e-Learning still keeps on attracting much attention from enterprises and universities. With more utilization of systems in higher education, researchers’ assessment the performance these becomes highly critical. In developing tendency toward e-learning systems, behavioral intention models (such as TAM, TPB, UTAUT) appear to be especially useful investigating adoption technologies. A large number studies have indicated several factors that would influence usage...

Since the global financial crisis in 2008 had caused economic depression, public were commonly losing confidence monetary system and international fund associations. Thus, concept of untraditional currency exchange was developed. Nakamoto (2008) designed bitcoin, a decentralized digital which is launched traded on Internet. Bitcoin being gradually accepted by public, attributed to feature decentralization anonymity. The rate bitcoin reached peak price at $4425.30 USD August 16th, 2017....

Japan is generally perceived to be a technologically advanced country, but it was found that its e-payment systems appear somewhat behind many other Asian countries.With the upcoming Summer Olympics in 2020, Japanese government and business sectors want improve Japan's systems.This provided motivation for authors study state of explore factors affecting behavior among young Japanese.The used Technology Acceptance Model (TAM) as foundation examined 152 survey responses identify usage...

Nanosized particles of liquid metals are emerging materials that hold promise for applications spanning from microelectronics to catalysis. Yet, knowledge their chemical reactivity is largely unknown. Here, we study the Ga and Cu nanoparticles under application a cathodic voltage. We discover applied voltage spatial proximity these two particle precursors dictate reaction outcome. In particular, find gradual ramp crucial reduce native oxide skin gallium enable reactive wetting between...

Internet technology has influenced banking systems because of its capability to enhance the performance financial operations. Several factors influence adoption new within industry. Namely customers' perception benefit, quality, Ease Use, Security, Self-Efficacy, and Trust. However, various cultures geopolitical issues are therefore worth further study. This paper focuses on that behaviors Saudi Arabians their e-payment systems. The shows fundamental discoveries an investigation examining...

Everyday experiences suggest that a container, such as box of cereal, can convey pertinent information about the nature and quantity its content. This study investigated how well people judge large quantities objects in container through haptic perception. Stimuli consisted plastic drinking straws cut to “small” (1.5 cm) or “big” (4.5 pieces contained food containers. Participants performed both magnitude estimation number direct proportion perceived be filled with objects. Overall,...

The purpose of this paper is to explore the factors that influence e-payment behaviour Macao's young citizens. mediating effect intention between certain and adoption also considered. This study develops a conceptual model proposes applies technology acceptance (TAM) unified theory use (UTAUT). 279 valid samples were collected from Macao citizens aged 16 40, who belong Y generation (= Gen Y) Z Z), test model. supports some relationships TAM UTAUT, such as perceived usefulness (PU), ease...

According to the reports of a NGO-World Blind Union in 2017, approximately 253 million people have visual impairment. Besides, statistics Taiwan's Ministry Health and Welfare also reported that number keep growing these two decades. Therefore, how assist them better dail y life experiences will be significant issue. The purposes this study were designing constructing guidance system order know their spatial position further guide arrive destination. In system, researchers used integration...

Plasmonic metal nanoparticles (NPs) show promise in a variety of applications, ranging from theranostics to chemical sensing, with sensing made possible by the sensitivity localized surface plasmon resonance (LSPR) surrounding dielectric environment. Au NPs have been standard for LSPR applications due their narrow band, tunable maximum, and relative stability; however, comparatively low refractive index (RIS) morphological instability nanostructures are limiting factors. Recent research has...

Because of the increasing prevalence e-payment services across globe, it is vital to understand what affects how and extent people utilize them. A survey was distributed students staff at Ain Shams University in Cairo, Egypt. Theoretically, TAM model, TRA social norms play a role technology adoption. Most results are found be consistent with those western societies. Specifically, six constructs relating adoption four demographic backgrounds were tested. Usage measured by three questions....

The skills related to the use of information and communication technologies (ICT) were examined in this study within context eight communities with a high degree vulnerability diversity. objectives were: a) conduct diagnosis thirteen competencies ICT Mayan-speaking state Yucatan, Mexico, b) examine such variables as gender, marital status, education level their parents. relation among these youth.

Applying the molecular concepts of regioselectivity and chemoselectivity to nanocrystal chemistry is giving access complex nanostructures with spatial precision.