Abstract The Nb 2 CT x prepared by hydrothermal-assisted in-situ HF generation etching was investigated in terms of its gas sensor performance. obtained mixing AlC with pure water, hydrochloric acid, and fluoride (LiF or NH 4 F) then hydrothermally treated at 180 °C for 24 h. This hydrothermal treatment more efficient safer the synthesis than direct etching. etched LiF had relatively wide inter...

Advancements in fabrication of miniaturized optical scanners would benefit from micrometer sized fiber tips. The change the cross section an tip is often accompanied with presence a longer tapered area. reduction double clad fibers (DCFs) flat interface surface at region where takes place (with abrupt section) considered this paper. Various methods such as heating and pulling, wet etching using...

background and aims. nano-ionomer (ni) interacts with tooth structures superficially, and there is a concern about the enamel bonding ability of mild self-etch ketac primer. this study compared the effect of different adhesive procedures (self-etching and etch-and-rinse approach) on long-term marginal microleakage of nano-filled resin-modified glass-ionomer (ni) cervical restorations. materials...

The low level doping of a selective emitter by etch back is an easy and low cost process to obtain a better blue response from a solar cell. This work suggests that the contact resistance of the selective emitter can be controlled by wet etching with the commercial acid barrier paste that is commonly applied in screen printing. Wet etching conditions such as acid barrier curing time, etchant co...

Background Restorative dentists and orthodontists have described severely fluorotic teeth as the most difficult surface for bonding.1,2 The difficulty arises from the composition of the enamel of such teeth, which has an acid-resistant, hypermineralized outer layer. As a result, it is very difficult to mechanically treat the surface with conventional 37% phosphoric acid to allow for effective b...

In recent years, the rapid economic development in Taiwan has resulted greater complexity handling industrial hazardous waste. The main aim of this paper was to present a trend analysis online reported amounts waste from official database over past decade (2010–2020). addition, study focused on environmental policies and regulatory measures for mandatory material resources according promulgatio...