# Xps Surface Analyzer

> X-ray Photoelectron Spectroscopy analysis skill for surface composition, chemical state, and depth profiling

- Skill: `a5c-ai/xps-surface-analyzer` (Agent Skill)
- Install (CLI): `npx skillmds@latest add a5c-ai/xps-surface-analyzer`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/xps-surface-analyzer/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/xps-surface-analyzer

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# XPS Surface Analyzer

## Purpose

The XPS Surface Analyzer skill provides comprehensive X-ray Photoelectron Spectroscopy data analysis for nanomaterial surface characterization, enabling quantitative determination of surface composition, chemical states, and depth-dependent composition profiles.

## Capabilities

- Survey and high-resolution spectra acquisition
- Peak fitting and deconvolution
- Chemical state identification
- Quantitative surface composition
- Depth profiling analysis
- Charge correction and calibration

## Usage Guidelines

### XPS Analysis Workflow

1. **Survey Spectra**
   - Identify all elements present
   - Check for unexpected contamination
   - Plan high-resolution scans

2. **Peak Fitting**
   - Apply appropriate background (Shirley, Tougaard)
   - Constrain FWHM within physical limits
   - Assign chemical states from binding energy

3. **Quantification**
   - Apply relative sensitivity factors
   - Account for matrix effects
   - Report with appropriate uncertainty

## Process Integration

- Multi-Modal Nanomaterial Characterization Pipeline
- Nanomaterial Surface Functionalization Pipeline
- Structure-Property Correlation Analysis

## Input Schema

```json
{
  "sample_id": "string",
  "elements_of_interest": ["string"],
  "analysis_type": "survey|high_resolution|depth_profile",
  "charge_reference": "C1s|Au4f|other"
}
```

## Output Schema

```json
{
  "composition": [{
    "element": "string",
    "concentration": "number (at%)",
    "uncertainty": "number"
  }],
  "chemical_states": [{
    "element": "string",
    "state": "string",
    "binding_energy": "number (eV)",
    "fraction": "number (%)"
  }],
  "depth_profile": {
    "depths": ["number (nm)"],
    "compositions": [{}]
  }
}
```