1：Experimental Design and Method Selection:

The study used symmetric all-carbon molecular junctions fabricated with nitroazobenzene oligomers. The experimental design involved illuminating the junctions with UV?vis light through a partially transparent top electrode and monitoring conductance with a DC bias. Theoretical models include quantum tunneling and resonant transport mechanisms.

2：Sample Selection and Data Sources:

Samples were molecular junctions with nitroazobenzene layer thicknesses ranging from 3.8 to 9.4 nm, fabricated on fused quartz substrates. Data were collected from multiple independent junctions to ensure reliability.

3：8 to 4 nm, fabricated on fused quartz substrates. Data were collected from multiple independent junctions to ensure reliability. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment includes a Xe Arc lamp, monochromator, optical shutter, Keithley 2602B Source Measurement Unit, Thorlabs laser diodes, power meter, vacuum probe station with temperature controller, and atomic force microscopy for thickness measurement. Materials include nitroazobenzene oligomers, carbon surfaces, gold and chromium electrodes.

4：Experimental Procedures and Operational Workflow:

Junctions were fabricated using established procedures. Photocurrent measurements involved applying a DC bias, illuminating with controlled light (wavelength, intensity), and recording current with light on and off. Temperature dependence was studied from 80 to 450 K. Data acquisition was automated with custom software.

5：Data Analysis Methods:

Data were analyzed using statistical averaging, exponential fitting for attenuation coefficients, linear regression for intensity dependence, and comparison with absorption spectra. Software included custom Visual Basic programs and possibly other tools for spectral correction.