Seismocardiography (SCG) is a measure of chest vibration associated with heartbeats. While skin soft electronic tattoos (e‐tattoos) have been widely reported for electrocardiogram (ECG) sensing, wearable SCG sensors are still based on either rigid accelerometers or non‐stretchable piezoelectric membranes. This work reports an ultrathin and stretchable SCG sensing e‐tattoo based on the filamentary serpentine mesh of 28‐µm‐thick piezoelectric polymer, polyvinylidene fluoride (PVDF). 3D digital image correlation (DIC) is used to map chest vibration to identify the best location to mount the e‐tattoo and to investigate the effects of substrate stiffness. As piezoelectric sensors easily suffer from motion artifacts, motion artifacts are effectively reduced by performing subtraction between a pair of identical SCG tattoos placed adjacent to each other. Integrating the soft SCG sensor with a pair of soft gold electrodes on a single e‐tattoo platform forms a soft electro‐mechano‐acoustic cardiovascular (EMAC) sensing tattoo, which can perform synchronous ECG and SCG measurements and extract various cardiac time intervals including systolic time interval (STI). Using the EMAC tattoo, strong correlations between STI and the systolic/diastolic blood pressures, are found, which may provide a simple way to estimate blood pressure continuously and noninvasively using one chest‐mounted e‐tattoo.

Between 1999 and 2003, Asian Americans and Pacific Islanders (APIs) in the US experienced more rapid growth in the number of AIDS cases than any other racial or ethnic group. In addition, the prevalence of HBV and HIV co-infection is estimated to be significantly higher among APIs in the US than in other racial/ethnic groups. High rates of HIV and hepatitis B or C (HBV and/or HCV) co-infection, in concert with language and cultural barriers, create significant challenges to effective coordination of treatment. The purpose of this study is to identify barriers to care and treatment in APIs with HIV with and without hepatitis co-infection. Specifically, we analyze results from semi-structured interviews with health care providers (N=23) and Asian Americans who are HIV and hepatitis (HBV and/or HCV) co-infected (N =17) in order to clarify how stigma in particular may impede/limit access to coordinated health care provision. Providers and clients recognize the need for integrated, culturally and linguistically appropriate access to care while simultaneously acknowledging that stigma is a severe barrier to access to care. This article sheds light on the complexities of the stigma experienced by HIV and hepatitis co-infected Asian Americans and suggests a need for further research and renewed efforts by caregivers to reduce stigma in these communities.

In article number 1900290 , Nanshu Lu and co‐workers create a noninvasive, ultrathin, and stretchable e‐tattoo capable of electro‐mechano‐acoustic cardiovascular (EMAC) sensing to synchronously measure electrocardiogram (ECG) and seismocardiogram (SCG), which can be used to extract various cardiac time intervals and infer systolic and diastolic blood pressure beat‐to‐beat. A 3D digital image correlation (DIC) method is applied to map human chest displacement to determine the best location for e‐tattoo attachment.

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Ultrawide-bandgap (UWBG) deep-ultraviolet photodetectors have received great attention due to their versatile applications in the fields of scientific research, civilian infrastructure, military defense, etc. In this perspective, we fabricated deep-ultraviolet β-MgGaO metal–semiconductor–metal photodetectors with interdigital Pt/Au metal contacts. β-Phase MgGaO ternary alloy thin films of different Mg atomic percentages were grown using oxygen plasma-assisted molecular beam epitaxy. Ultrawide bandgaps of 5.03, 5.09, 5.15, and 5.22 eV were achieved for thin films with and without Mg2+ incorporation, and light transmittances of all samples were around 90% in the visible region. Raman spectra indicate that Mg2+ atoms have replaced the position of Ga3+ ions in both octahedral and tetrahedral chains. The responsivity of the detectors was investigated. The irradiation wavelength-, temperature-, and power-dependent I–V curves, photocurrent spectra, and dynamics of the photocurrents were measured. This work suggests that UWBG β-MgGaO semiconductors have a potential for deep-ultraviolet photodetectors and other photonic device applications.

Two-dimensional wafer-scale and single-crystal hexagonal boron nitride (h-BN) films are considered a crucial part of the next generation of van der Waals (vdW) electronic devices. Progress has been made in the synthesis process recently, leading to the demonstration of electronic devices. In this work, we report an effective method to synthesize high-quality single-crystal h-BN monolayer films. Single-crystal metal substrates were produced by thermal annealing of Ni foils, followed by electropolishing to remove the passivated surface layer. Molecular beam epitaxy was employed to synthesize 1 in.2 monolayer single-crystal h-BN films. We discovered that electropolishing plays an important role in drastically increasing the speed of h-BN film growth. Robust nanocapacitors were fabricated using as-grown monolayer h-BN films. The nanocapacitance effect and tunneling current mechanism were studied in detail, and the “effective distance” concept is introduced to explain the quantum phenomenon in the (vdW) metal–insulator–metal devices using atomically thin dielectric h-BN films.

Message sidedness, including its later format inoculation, and conclusion explicitness have been identified by researchers as two prominent message factors that may influence advocating effects. Two-sided messages, which contain both supporting and opposing information about the issue, particularly those containing inoculation components that refute the negative side, are found to be more effective than one-sided messages. Messages with explicit conclusions are also found to be more persuasive than those that let the audience draw the conclusions themselves. This study tested the persuasion effectiveness of message inoculation and conclusion explicitness on a new scientific concept, the water–energy–food (WEF) nexus, of which the public has little knowledge. This study used five randomly assigned groups (total N = 524) and found that messages with explicit conclusions are more persuasive than those with implicit conclusions; however, it found no difference between the effectiveness of one-sided messages and of refutational two-sided messages. The study suggests that a clear conclusion is necessary to communicate the WEF nexus for a better approach to managing the megacrisis of water, energy, and food security.

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