主要规格及技术指标

"Technical Specification:
Main configuration: 1. Versa SCAN positioning system, controller, and base. 2. Scanning electrochemical microscope. 3. Small cell for Versa SCAN systems
主要配置：1. 电化学扫描平台、定位系统和控制器。2. 电化学扫描显微镜系统。3. 扫描小电解池
Main technical parameters：
1. Data acquisition:
• Data acquisition: 3 x 16 bit 500K sample/s, digital to analog conversion synchronous potential / current / auxiliary
• Time resolution: 2 μ s (500K sample /s)
• Automatic noise filtering: available
2. Power amplifier
• Output voltage: ± 12V
• Output current: ± 1a (standard configuration)
• Constant potential bandwidth: 1 MHz
• Stability setting: high speed / high stability (can be set according to specific test)
• Switching speed: > 8V / μ s
• Rise time (- 1.0V to + 1.0V): < 350 NS
3. Potential control (potentiostatic mode)
• Applied potential range: ± 10V
• Applied potential resolution: for ± 10mV signal = 300nv, for ± 100mV signal = 3 μ v,
For ±1V signal = 30µV, for ±10V signal = 300µV
• Precision of applied potential: ± 0.2% of value ± 2mV
• Maximum scanning speed: 5000 VS-1 (50 MV step)
• Maximum scanning speed range and accuracy: ± 10V / 300 μ V
4. Current control (constant current mode)
• Applied current range: ± 1A
• Applied current resolution: ± 1 / 32000 x full range
• Accuracy of applied current: ± 0.2% of range
• Maximum current range / resolution: ± 1A / 60 μ a
• Minimum current range / resolution: ± 4na / 120fa
5. Differential electrometer
• Maximum input range: ± 10V
• Bandwidth: ≥ 10MHz (3dB)
• Input impedance: ≥ 1012 Ω in parallel with ≤ 5pf (typical)
• Leakage current: ≤ 5pa at less than 25 ° C
• CMRR: 60 dB at 100kHz (typical)
6. Potential measurement
• Potential measurement range: ± 10V
• Minimum potential resolution: 6 μ V
• Potential accuracy: ± 0.2% of reading ± 2mV
7. Current measurement
• Current measurement range: 1A to 4 Na (8 ranges)
• Current resolution: 120fa (4na range)
• Current accuracy (DC): 4na: < 0.5% ± 20Pa
• Bandwidth: 1MHz (signal ≥ 2mA range typical)
• Bandwidth noise filtering function: Yes, 5 levels
8. IR compensation
• Positive feedback: Yes
• Dynamic IR compensation: Yes
9. Interface (standard configuration)
• Digital input / digital output: 5 TTL logic output, 2 TTL logic input
• Auxiliary voltage input: synchronous measurement of voltage and current; ± 10V range, input impedance 10K Ω; filter: off, 1kHz, 200kHz; BNC connector
• Digital to analog conversion voltage output (standard configuration): ± 10V range, output impedance 1K Ω; BNC connector (for agitator, rotating disk electrode, etc

1. 数据采集
数据采集：3 x 16 bit 500k 样品/秒 数模转换同步电位/电流/辅助
时间分辨率：2µs (500k 样品/秒)
自动噪音滤波：可用
2. 功率放大器
输出电压：±12V
输出电流：±1A (标配)
恒电位带宽：1 MHz
稳定性设定：高速/高稳定性 (可根据具体试验设置)
切换速度：>8V/µs
上升时间 (-1.0V to +1.0V)：<350 ns
3. 电位控制 (恒电位模式)
施加电位范围：±10V
施加电位分辨率：for ±10mV signal = 300nV， for ±100mV signal = 3µV，
for ±1V signal = 30µV, for ±10V signal = 300µV
施加电位精度：±0.2% of value ±2mV
最大扫速：5000 Vs-1 (50 mV step)
最大扫速范围及精度：±10V / 300µV
4. 电流控制 (恒电流模式)
施加电流范围：±1A
施加电流分辨率：±1/32,000 x 全量程
施加电流精度：±0.2% of range
最大电流量程/分辨率：±1A / 60µA
最小电流量程/分辨率：±4nA / 120fA
5. 差分静电计
最大输入范围:±10V
带宽:≥10MHz (3dB)
输入阻抗:≥1012 Ω in parallel with ≤5pF (typical)
漏电流:≤5pA at less than 25°C
CMRR: 60 dB at 100kHz (typical)
6. 电位测量
电位测量范围:±10V
最小电位分辨率:6µV
电位精度:±0.2% of reading ±2mV
7. 电流测量
电流测量范围:1A to 4 nA (8 量程)
电流分辨率:120fA (4nA 量程)
电流精度 (DC): 4nA: <0.5% ±20pA
带宽:1MHz (signal ≥2mA range typical)
带宽噪声滤波功能: 有, 5档
8. iR 补偿
正反馈:有
动态 iR 补偿:有
9. 接口 (标配)
数字输入/数字输出:5 TTL logic 输出, 2 TTL logic 输入
辅助电压输入:同步测量电压及电流; ±10V 范围, 输入阻抗10kΩ; Filter: off, 1kHz, 200kHz; BNC connector
数模转换 电压输出 (标配): ±10V 范围, 输出阻抗1kΩ; BNC connector (用于搅拌器，旋转盘电极等)

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主要功能及特色

Features and application:
The SECM scanning electrochemical microscope integrates positioning system, double potentiostat and ultra-microelectrode probe. The positioning system makes the probe close to the surface of the sample. The double potentiostat polarizes the sample and the probe respectively, and measures the current generated by the two. The probe is a special conical polished ultramicroelectrode with an active radius less than 100 μ M. The positioning system can detect the micro area signal and map the position, using the measuring probe to scan, to measure the electrochemical parameters and create the micro area electrochemical activity data map.
As the imaging mechanism is electrochemistry, the application of SECM is as diverse as that of electrochemistry itself. In some key areas, such as biosensor, reaction kinetics, porous membrane research, fuel cell catalyst and corrosion mechanism, it has played an important role.
SECM扫描电化学显微镜, 集定位系统、双恒电位 仪和超微电极探针为一体。定位系统使探针接近样 品的表面。双恒电位仪分别极化样品和探针, 并测量二者产生的电流。探针为顶部特殊锥形抛光的超微电极,活性半径小于100微米。定位系统通过在 可以探测到微区信号并成图的位置上,用测量探针进行扫描,来测量电化学参数,创建微区电化学活性数据图谱。
由于成像机理是电化学,SECM的应用就如同电 化学本身的应用一样多种多样。在某些关键的领域, 如生物传感器, 反应动力学, 多孔膜的研究, 燃料电池催化剂和腐蚀机理等研究方面已经发挥巨大作用。

主要附件及配置

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