Authors
Runqiu Wang, Ying He, Shunda Qiao, Chu Zhang, Haiyue Sun, Yufei Ma
Published in
ACS sensors. Jul 07, 2026. Epub Jul 07, 2026.
Abstract
To overcome the limitations of the standard single‑ended quartz tuning fork (QTF) in quartz‑enhanced laser spectroscopy, this work introduces a novel double-ended QTF (DE-QTF) design as a new sensing strategy. It offers three key advantages: (1) confined acoustic interaction minimizes energy loss while concentrated stress increases piezoelectric charge; (2) wide central clearance and extended mid-section acoustic coverage enable multibeam excitation and integration of acoustic microresonators (AmRs), enhancing quartz-enhanced photoacoustic spectroscopy (QEPAS) sensitivity; and (3) strengthened mechanical constraints on thermal expansion convert more laser energy into useful stress, boosting the light-induced thermoelastic spectroscopy (LITES) signal. Experimentally, in QEPAS and DE-QTF achieved a 3.1-fold higher signal compared to a standard QTF. The multipass and AmRs configurations amplified signals over 429 times compared to the single-excited DE-QTF, yielding a 12.58 ppb minimum detection limit (MDL) for acetylene. In LITES, it provided a 6.9-fold signal improvement. This work provides a new pathway to break the sensitivity bottleneck in trace gas detection via QTF structural innovation.
PMID:
42412902
Bibliographic data and abstract were imported from PubMed on 08 Jul 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 2
- Comments 0