Ultra-Low-Power and Wide-Operating-Voltage-Window Capacitive Piezotronic Sensor through Coupling of Piezocharges and Depletion Widths for Tactile Sensing

The rapid growth of Artificial Intelligence and Internet of Things (AIoT) demands the development of ultra-low-power devices for future advanced technology. In this study, we introduce a capacitive piezotronic sensor specifically designed for tactile sensing, which enables an ultra-low-voltage operation at nearly 0 reading bias conditions with a consistent response within a wide voltage range. This sensor directly detects capacitance changes induced by piezocharges, reflecting perturbation of the effective depletion width, and ensures ultralow power capability by eliminating the necessity of turning on the Schottky diode for the first time. The dynamic response of the sensor demonstrates ultralow power capability and immunity to triboelectric interference, making it particularly suitable for tactile sensing applications in robotics, prosthetics, and wearables. This study provides valuable insights and design guidelines for future ultra-low-power thin-film-based capacitive piezotronic/piezophototronic devices for tactile sensing

Ultra-Low-Power and Wide-Operating-Voltage-Window Capacitive Piezotronic Sensor through Coupling of Piezocharges and Depletion Widths for Tactile Sensing

The rapid growth of Artificial Intelligence and Internet of Things (AIoT) demands the development of ultra-low-power devices for future advanced technology. In this study, we introduce a capacitive piezotronic sensor specifically designed for tactile sensing, which enables an ultra-low-voltage operation at nearly 0 reading bias conditions with a consistent response within a wide voltage range. This sensor directly detects capacitance changes induced by piezocharges, reflecting perturbation of the effective depletion width, and ensures ultralow power capability by eliminating the necessity of turning on the Schottky diode for the first time. The dynamic response of the sensor demonstrates ultralow power capability and immunity to triboelectric interference, making it particularly suitable for tactile sensing applications in robotics, prosthetics, and wearables. This study provides valuable insights and design guidelines for future ultra-low-power thin-film-based capacitive piezotronic/piezophototronic devices for tactile sensing

Crystal Face-Dependent Nanopiezotronics of an Obliquely Aligned InN Nanorod Array

This paper proposes an obliquely aligned InN nanorod array to maximize nanorod deformation in the application of nanopiezotronics. The surface-dependent piezotronic <i>I</i>–<i>V</i> characteristics of the InN nanorod array with exposed polar (0002) and semipolar (1̅102) planes were studied by conductive atomic force microscopy. The effects of the piezopotential, created in the InN under straining, and the surface quantum states on the transport behavior of charge carriers in different crystal planes of the InN nanorod were investigated. The crystal plane-dependent electron density in the electron surface accumulation layer and the strain<b>-</b>dependent piezopotential distribution modulate the interfacial contact of the Schottky characteristics for the (0002) plane and the quasi-ohmic behavior for the (1̅102) plane. Regarding the piezotronic properties under applied forces, the Schottky barrier height increases in conjunction with the deflection force with high current density at large biases because of tunneling. The strain-induced piezopotential can thus tune the transport process of the charge carriers inside the InN nanorod over a larger range than in ZnO. The quantized surface electron accumulation layer is demonstrated to modulate the piezopotential-dependent carrier transport at the metal/InN interfaces and become an important factor in the design of InN-based piezotronic devices and nanogenerators

The association of amputation status after PTA with prognoses.

<p>The hazard ratio were adjusted for age, gender, diabetes, hypertension, dyslipidemia, previous cerebral vascular accident, heart failure, coronary artery disease, chronic kidney disease, gout, AF, malignancy, chronic obstructive pulmonary disease, center volume and level of hospital.</p><p>Abbreviations: MACE = major adverse cardiac events; LE = Lower extremity preserved; BK = below knee; AK = above knee; HR = hazard ratio; CI = confidence interval.</p><p>The association of amputation status after PTA with prognoses.</p

Comparison of prognostics among the study groups.

<p>(A) major adverse cardiac events in one year, (B) 1-year mortality, (C) overall major adverse cardiac events, and (D) overall mortality.</p

Enrollment flow chart.

<p>Enrollment flow chart.</p

The association of amputation status after PTA with complication at same admission.

<p>The odds ratio were adjusted for age, gender, diabetes, hypertension, dyslipidemia, previous cerebral vascular accident, heart failure, coronary artery disease, chronic kidney disease, gout, AF, malignancy, chronic obstructive pulmonary disease, center volume and level of hospital.</p><p>Abbreviations: ARF = acute renal failure; MACE = major adverse cardiac events; LE = Lower extremity preserved; BK = below knee; AK = above knee; OR = odds ratio; CI = confidence interval.</p><p>The association of amputation status after PTA with complication at same admission.</p

Clinical characteristics and comorbidities of the study patients.

<p>Abbreviations: COPD = chronic obstructive pulmonary disease; CABG = coronary artery bypass graft; DM = diabetes; LE = Lower extremity preserved; BK = below knee; AK = above knee.</p><p>Clinical characteristics and comorbidities of the study patients.</p

Cause of mortality (<i>n</i> = 2531).

<p>*included UTI, septic septicemia, gangrene, decubitus ulcer.</p><p>Abbreviations: DM = diabetes; PAD = peripheral artery disease; COPD = chronic obstructive pulmonary disease; GI = Gastrointestinal; LE = Lower extremity preserved; BK = below knee; AK = above knee.</p><p>Cause of mortality (<i>n</i> = 2531).</p

Benefits of Intraaortic Balloon Support for Myocardial Infarction Patients in Severe Cardiogenic Shock Undergoing Coronary Revascularization - Fig 2

<p><b>Cumulative probability of event-free survival for (A) myocardial infarction, (B) cerebrovascular accident, (C) cardiovascular death, and (D) primary composite endpoint.</b> The primary outcome was a composite of myocardial infarction (MI), cerebrovascular accident (CVA), or cardiovascular death. A higher recurrent MI rate in the IABP group than the Nonuser group (7% versus 6.9%, p = 0.001). The rate of CVA was similar between the two groups (5% versus 6.3%, p = 0.654). A higher cardiovascular death rate in the IABP group than the Nonuser group (36.9% versus 24%, p<0.001). More composite primary outcome occurred in IABP group than Nonuser group (45.2% versus 34.1%, p<0.001).</p