Correction: A vertical WSe2–MoSe2 p–n heterostructure with tunable gate rectification

Correction for ‘A vertical WSe₂–MoSe₂ p–n heterostructure with tunable gate rectification’ by Hailing Liu et al., RSC Adv., 2018, 8, 25514–25518.

The authors regret that Hailiang Liu’s name was spelled incorrectly in the original article; the corrected version is shown above.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Motives of excessive Internet use and its impact on the academic performance of business students in Pakistan

Aim: Nonavailability of Internet is thought to be a nightmare in this technology-fluxed world. The current investigation aims at examining the excessive Internet usage motives and the effect of this excessive Internet usage on the academic performance of students seeking business education.

Methods: A sample of 350 business students considered for the study resulted in providing meaningful results. A quantitative, explanatory, cross-sectional design is used for conducting this study.

Originality: Use of “uses and gratification” theory for selecting the motives of excessive Internet use in Pakistan along with the application of Structural equation modeling seems a unique effort for the sample selected from Pakistan.

Findings: The results support the view that entertainment, social interaction, information seeking, and economic motives play a significant role in excessive Internet usage, and finally excessive Internet usage has a negative effect on the academic performance of students.     

Giant cell arteritis of the skin simulating erythema nodosum.

Cutaneous involvement in giant cell arteritis is quite uncommon. A patient is described who presented with pretibial skin lesions clinically indistinguishable from erythema nodosum which, on biopsy, showed subcutaneous pannicular giant cell vasculitis. Cutaneous manifestations of giant cell arteritis are subsequently reviewed.     

A novel donor–π–acceptor halochromic 2,6-distyrylnaphthalene chromophore: synthesis,photophysical properties and DFT studies

In this study a new 2,6-distyryl naphthalene [2-((4-((E)-2-(6-((E)-2,4-bis(methylsulfonyl)styryl)naphthalen-2-yl)vinyl)phenyl)(ethyl)amino)ethan-1-ol; ASDSN] was synthesized successfully using Heck chemistry as the main reaction. The ASDSN compound is a donor–pi–acceptor (D–π–A) conjugated system with amino as electron donating and sulfonyl as electron withdrawing groups. The UV-vis absorption of ASDSN was observed in the range of 403–417 nm with high molar extinction coefficients (ε = 15 300–56 200 M⁻¹ cm⁻¹) in some different solvents. This new fluorescent 2,6-distyryl naphthalene compound emits in the yellow region of the visible spectrum (557 nm) with Stokes shifts of 5930 cm⁻¹. ASDSN is a pH-responsive fluorescence compound that shows yellow fluorescence in neutral form and blue fluorescence in the protonated form. A white light emission (WLE) for the chromophore was observed at pH = 3.0. The ASDSN chromophore presented a satisfactory white light quantum yield (Φ) of 13% which was desirable for producing white light emitting devices. Density functional theory (DFT) and time-dependent (TD)-DFT were applied to study structural and electronic properties of the chromophore.

A new pH-responsive fluorescence chromophore with white light emission at pH = 3 was synthesized which has high potential application in the preparation of high-performance lighting devices.