Diamond Knife (Domestic) –合肥科晶 Quartz Crystal Microbalance Accessory
| Brand | Hefei Kejing |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic |
| Model | Diamond Knife (Domestic) |
| Pricing | Upon Request |
Overview
The Diamond Knife (Domestic) is a precision mechanical accessory engineered for controlled micro-sectioning and surface preparation of single-crystal substrates used in quartz crystal microbalance (QCM) sensor development, thin-film epitaxy, and surface science experiments. Unlike standard scalpel blades or silicon carbide tools, this knife employs a natural diamond tip mounted on a rigid, ergonomic stainless-steel handle with telescoping adjustment—enabling micron-level positioning stability during manual cleavage or edge trimming. Its design adheres to the mechanical requirements of QCM electrode fabrication where substrate flatness, edge integrity, and minimal subsurface damage are critical for reliable frequency-shift calibration and mass-sensitivity validation. The tool does not function as a standalone analytical instrument but serves as a certified sample-handling component compatible with ISO/IEC 17025-accredited QCM workflows requiring traceable physical preparation steps.
Key Features
- Natural diamond cutting tip with Vickers hardness ≥10,000 HV, ensuring exceptional wear resistance and dimensional stability over repeated use on sapphire, SiO₂, LiNbO₃, and quartz substrates.
- Telescoping pen-style handle with fine-threaded extension mechanism (±0.1 mm resolution), allowing repeatable blade protrusion control for consistent cut depth across multiple samples.
- Compact form factor (145 mm × 16 mm Ø) and lightweight construction (≤85 g), optimized for glove-box integration and cleanroom-compatible handling without compromising torque transmission.
- Non-magnetic 316L stainless-steel housing compliant with ASTM F899 standards for surgical-grade instrumentation materials, minimizing particulate generation and electrochemical interference.
- Interchangeable tip retention system enabling field replacement without recalibration—compatible with Kejing’s A-Z series crystal mounting jigs and alignment fixtures.
Sample Compatibility & Compliance
The Diamond Knife is validated for use with standard QCM resonator blanks (5–10 MHz AT-cut quartz wafers, 14 mm diameter, 0.168 mm thickness) and extended-range substrates including ST-cut lithium tantalate and langasite crystals. It supports preparation of electrodes for both gravimetric and viscoelastic QCM-D measurements when paired with Kejing’s QCM-D modules. All handling procedures align with ISO 14644-1 Class 5 cleanroom protocols; blade sterilization may be performed via ethanol wipe or UV-C exposure (254 nm, 30 min) without degradation. No regulatory certification (e.g., FDA 510(k), CE IVD) applies, as the device is classified as an ancillary lab tool under IEC 61010-1:2010 safety guidelines for laboratory equipment.
Software & Data Management
This mechanical accessory operates independently of software control and generates no digital output. However, it integrates into documented QCM experimental protocols where sample preparation steps—including blade calibration date, usage count, and substrate lot traceability—are recorded manually or within LIMS platforms supporting GLP/GMP audit trails. When used in conjunction with Kejing’s QCM data acquisition systems (e.g., QCM-2000 series), operators are advised to log knife usage parameters in the “Sample Prep” metadata field to ensure full chain-of-custody compliance per ISO/IEC 17025 Clause 7.5.2.
Applications
- Precision cleaving of bulk crystal ingots prior to wafer slicing for QCM blank manufacturing.
- Edge chamfering and defect removal on pre-polished quartz substrates to eliminate edge-mode resonance artifacts.
- Localized ablation of conductive layers (e.g., Au/Ti films) during QCM electrode patterning without thermal damage to underlying piezoelectric material.
- Preparation of reference surfaces for QCM-based protein adsorption kinetics studies requiring atomically defined boundaries.
- Maintenance of crystal holder alignment fixtures in Kejing A-Z series cleaning and coating stations.
FAQ
Is this diamond knife suitable for automated micromanipulation stages?
No—it is designed exclusively for manual operation with tactile feedback; no motorized or robotic interface is provided or validated.
Can the diamond tip be re-sharpened in-house?
No—natural diamond tips are not user-reconditionable; replacement blades must be sourced directly from Hefei Kejing to maintain geometric tolerances.
Does the knife meet USP particulate matter requirements for pharmaceutical QCM applications?
While the tool itself is not tested per USP , its stainless-steel construction and cleanroom-compatible handling protocol support compliance when used within validated environmental controls.
What is the recommended storage condition between uses?
Store vertically in supplied anti-static foam-lined wooden case at 20–25°C, 30–50% RH; avoid exposure to halogenated solvents or strong oxidizers.
Is calibration documentation included with shipment?
A Certificate of Conformance (CoC) listing batch number, diamond origin verification, and mechanical inspection results is provided; NIST-traceable calibration is not applicable for passive tools.
