Ultra-high performance humidity sensor enabled by a self-assembled CuO/Ti₃C₂T_X MXene

Abstract

Featuring high sensitivity, fast response time and good linearity, the CuO/Ti3C2TX humidity sensor has great potential for applications in health monitoring, environmental detection, and non-contact wearable electronics.

In situ growth of copper oxide on MXene by combustion method for electrochemical ammonia production from nitrate

“…The presence of a peak at 8.4° suggests the production of exfoliated layers corresponding to the (002) plane. 22 The peak at 8.4° moved to a broad peak at 11.6° along with the appearance of other Cu x O peaks after Cu x O self-assembled on Ti 3 C 2 T x , confirming the composite creation of Cu x O and Ti 3 C 2 T x . Cu x O/Ti 3 C 2 T x composites show diffraction peaks for CuO at 32.5°, 35.5°, 38.6°, 48.7°, 53.6°, 58.1°, 61.5°, 66.2°, 68.0° and 73.7°, corresponding to Miller indices (110), (002), (111), (−202), (020), (202), (−113), (−311), (220), and (221), respectively (agreed with reference code JCPDS no.…”

“…2(b) depicts the deconvoluted C 1s core level as four peaks at 283.6 eV, 284.7 eV, 285.9 eV, and 288.7 eV, which correspond to the C–Ti, C C, C–O, and C O bonds, respectively. 22 The deconvoluted peaks of Cu( ii ) and Cu( i ) states are shown in Fig. 2(c) .…”

“…2(d) depicts the core level of Ti 2p deconvoluted into two peaks at 458.3 eV and 464.4 eV, which correspond to the Ti–C and Ti–O bonds, respectively. 22 The appearance of Ti–O bonding could be due to oxidation during the combustion process, which converts unstable Ti–C bonds to Ti–O bonds. Furthermore, as seen in Fig.…”

New-Style Logic Operation and Neuromorphic Computing Enabled by Optoelectronic Artificial Synapses in an MXene/Y:HfO2 Ferroelectric Memristor

“…MXene is very designable due to its active functional groups and adjustable interlayer area. It also shows great potential in building humidity response devices when it is similar to graphene oxide in hydrophilicity. ,, At various relative humidity (RH) levels, the current variation of the MXene/Y:HfO 2 memristor is shown in Figure a by applying a reading voltage of 0.1 V. The device’s current remains consistent at lower RH levels and experiences a rapid increase as RH reaches 70%. Figure b presents the net photocurrent of MXene/Y:HfO 2 memristors under different RH conditions obtained by comparing the disparity in current between light and dark environments.…”

Enhancing the Ag-loading capacity on Ti3C2Tx sheets as hybrid fillers to form composite coatings with excellent antibacterial properties

“…[1][2][3][4] MXenes are classically obtained via etching selectively an A layer from an M n+1 AX n precursor, where M represents the transition metal elements, A represents the group 3 and 4 elements, X denotes N or C, and n is generally 1 to 3. Therefore, the M n+1 AX n structure is formed of M n+1 X n layers and obtains the 2D dimensional structure M n+1 X n T x , where T x represents the terminal groups, such as -OH, -O, -F. [5][6][7] Owing to their excellent properties, such as metallic conductivity, and mechanical and thermal stability, these materials are applied to reinforce a polymer matrix to enhance its hardness, strength, and the other functional properties in many intensive potential applications in a variety of areas, such as membrane, coating, photocatalysts. 8,9 In particular, MXene is naturally hydrophilic and exhibits expedient decoration due to the terminal functional groups (-OH, -O, -F) on the surface, and the multilayer or fewlayer structures are supporting a large specic surface area, suggesting it could be a promising carrier for advanced materials, and, particularly, a good candidate for preparing functional materials to potentially utilize in coating systems.…”