02239nas a2200253   4500008004100000022001400041245012100055210006900176260000800245490000600253520129900259653002801558653002301586653002401609653003701633653002001670100002701690700002201717700002401739700003701763700002801800700002501828856013201853       2025                        eng d  a2366-748600aAtomic Layer Deposition Grown Titania Phases (TiO2, TiO, Ti2O) and its Influence on Water Splitting Electrocatalysis0 aAtomic Layer Deposition Grown Titania Phases TiO2 TiO Ti2O and i  cAUG0 v93 a<p>
	The systematic engineering of atoms and the precise tuning of their arrangement can unlock a range of hidden yet remarkable properties of materials. In this study, different phases of titanium oxide, including TiO2, TiO, and Ti2O, are developed using the Atomic Layer Deposition (ALD) technique. Notably, a novel TiO(2 )electride with a pbcn space group is identified, and variations in stoichiometries, such as Ti1.80O, Ti2.05O, and Ti2.30O, are observed through Rietveld analysis of the corresponding X-ray Diffraction (XRD) data. High-resolution transmission electron microscopy (HRTEM) imaging further revealed line defects such as stacking faults and edge dislocations in Ti2O. The interplay of stoichiometric defects in Ti2O electrides leads to tunable electrocatalytic behavior, enabling transitions from oxygen evolution to hydrogen evolution reactions. Importantly, using Density functional theory (DFT), Paterson analysis, and Fourier electron density mapping, the exceptional metallic properties of Ti2O are rationalized as arising from its unique spatial electron density distribution. Overall, this work underscores the significance of atomic-level structure engineering and opens the door to a new class of titanium oxide catalysts for electrochemical water splitting.</p>
10aatomic layer deposition10adefect engineering10adefect-rich titania10aElectrocatalytic water splitting10aTi2O electrides1 aSwaminathan, Jayashree1 aPalani, Parthiban1 aSalpekar, Devashish1 aHernandez, Francisco, Carlos Rob1 aAshokkumar, Meiyazhagan1 aAjayan, Pulickel, M.  uhttps://library.ncl.res.in/content/atomic-layer-deposition-grown-titania-phases-tio2-tio-ti2o-and-its-influence-water-splitting02639nas a2200205   4500008004100000245011600041210006900157260000800226300001400234490000600248520193500254653002302189653001402212653001202226653000902238653001102247100002102258700003102279856012302310       2026                        eng d00aFlexible V2O5-x nanobelts as SERS tweezers: defect engineering for remarkably sensitive and selective detection0 aFlexible V2O5x nanobelts as SERS tweezers defect engineering for  cMAY  a8733-87480 v93 a<p>
	Transition metal oxide (TMO)-based semiconductor nanomaterials (NMs) have been progressively explored as promising substrates for surface-enhanced Raman scattering (SERS). The design and synthesis of highly stable, extremely sensitive, exceptionally selective SERS substrates, solely based on defects engineered in TMO-based NMs, have gained significant interest. This work demonstrates a simple hydrothermal route to synthesize substoichiometric V2O5-x flexible nanobelts without the use of surfactants, stabilizing agents, reducing agents, or structure-directing agents. Furthermore, the V2O5-x nanobelts proved to be highly effective as a SERS substrate for the sensitive detection of methylene blue (MB), achieving a remarkable maximum enhancement factor of up to 6.75 &amp; times; 10(9) and a detection limit as low as the picomolar level. This performance is the best among metal oxide semiconductors and is comparable to that of noble metals, even without the presence of a ``hot spot.'' Additionally, the V2O5-x nanobelts demonstrate excellent selectivity as a ``SERS Tweezer,'' enabling the precise detection of MB even in the presence of interfering analytes across binary, ternary, and quinary mixtures. Notably, V2O5-x nanobelts successfully detected melamine and ethephon for the first time using a TMO-based SERS substrate. In addition, the detection limit for SERS using a V2O5-x substrate reached 3 ppm of melamine in liquid milk. Thus, our results clearly demonstrate that metal oxide semiconductors can be transformed into cost-effective, SERS-active substrates through defect engineering. These engineered substrates exhibit high sensitivity, selectivity, stability, recyclability, and biocompatibility-comparable to or even surpassing those of noble metal nanomaterial-based SERS substrates. This advancement could enable their effective use in detecting contaminants in foods and food ingredients.</p>
10adefect engineering10aNanobelts10asensing10aSERS10aV2O5-x1 aKrishnan, Nikhil1 aMukherjee, Shatabdi, Porel  uhttps://library.ncl.res.in/content/flexible-v2o5-x-nanobelts-sers-tweezers-defect-engineering-remarkably-sensitive-and